General Knowledge

Mathematics Subtest

Test Format and Sample Questions

The Mathematics Subtest consists of approximately 35 multiple-choice questions and is 100 minutes long.

Each of the questions will contain four response options. You will choose the best response out of the available options, and indicate A, B, C, or D. For the Mathematics Subtest, an on-screen 4-function calculator and a mathematics reference sheet will be provided.

The table below presents types of questions on the exam and directs you to examples of these formats among the sample items that follow.

Table of Question Formats

Type of Question	Sample Question
Scenario Examine a situation, problem, or case study. Then answer a question, make a diagnosis, or recommend a course of action by selecting the best response option.	Question 2
Word Problem Apply mathematical principles to solve a real-world problem.	Question 7
Direct Question Choose the response option that best answers the question.	Question 18
Command Select the best response option.	Question 19
Graphics Choose the option that best answers a question involving a number line, a geometric figure, graphs of lines or curves, a table, or a chart.	Question 34

Sample Questions

The following questions represent both the form and content of questions on the examination. These questions will acquaint you with the general format of the examination; however, these sample questions do not cover all of the competencies and skills that are tested and will only approximate the degree of examination difficulty.

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Mathematics Subtest

Competency 1—Knowledge of number sense, concepts, and operations

Which of the following symbols should be placed in the box to form a true statement?

Choose an answer

1. = equals 
2. < less than 
3. > greater than 
4. ≤less than or equal to

AnswerEnter to expand or collapse answer.Answer expanded

Correct Response: C.

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Mathematics Subtest

Competency 1—Knowledge of number sense, concepts, and operations

The regular price of a computer is $1200 and the regular price of a printer is $300.  The regular price of a computer is 1200 dollars and the regular price of a printer is 300 dollas.  An electronics store has a promotion that offers a 40% 40 percent  discount on the printer when the computer is purchased at the regular price. What is the total cost of the computer and the printer at the promotional price?

Choose an answer

1. $1320 1320 dollars 
2. $1380 1380 dollars 
3. $1460 1460 dollars 
4. $1500 1500 dollars 

AnswerEnter to expand or collapse answer.Answer expanded

Correct Response: B.

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Mathematics Subtest

Competency 1—Knowledge of number sense, concepts, and operations

Which of the following symbols should be placed in the box to form a true statement?

Choose an answer

1. = equals 
2. < less than 
3. > greater than 
4. ≤less than or equal to

AnswerEnter to expand or collapse answer.Answer expanded

Correct Response: C.

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Mathematics Subtest

Competency 1—Knowledge of number sense, concepts, and operations

Students in a mathematics class are allowed to drop their lowest quiz grade. If a student earns the following grades, which grade will be dropped?

⁶/₈, ²/₃, 73%, ⁶/₁₀  six eights, two thirds, 73 percent, six tenth 

Choose an answer

1. ⁶/₈ six eights 
2. ²/₃ two thirds 
3. 73% 73 percent 
4. ⁶/₁₀ six tenth 

AnswerEnter to expand or collapse answer.Answer expanded

Correct Response: D.

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Mathematics Subtest

Competency 1—Knowledge of number sense, concepts, and operations

An electronics store has a current inventory of 50 stereo systems. The lowest priced stereo system in the store sells for $800,  The lowest priced stereo system in the store sells for 800 dollars,  and the highest priced stereo system sells for $3000.  and the highest priced stereo system sells for 3000 dollars.  Which of the following is the maximum amount of $3000 systems on hand Which of the following is the maximum amount of 3000 dollar systems on hand  if the current inventory totals $111,000? if the current inventory totals 111,000 dollars? 

Choose an answer

1. 30
2. 32
3. 35
4. 37

AnswerEnter to expand or collapse answer.Answer expanded

Correct Response: B.

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Mathematics Subtest

Competency 1—Knowledge of number sense, concepts, and operations

Simplify.

(15 − 3) ÷ (2 + 1) × (8 − 6) left paren 15 minus 3 right paren divided by left paren 2 plus 1 right paren times left paren 8 minus 6 right paren 

Choose an answer

1. 50
2. 42
3. 8
4. 2

AnswerEnter to expand or collapse answer.Answer expanded

Correct Response: C.

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Mathematics Subtest

Competency 2—Knowledge of geometry and measurement

A building 51 feet tall casts a shadow 48 feet long. Simultaneously, a nearby statue casts a shadow of 16 feet. How tall is the statue?

Choose an answer

1. 17 ft  17 feet 
2. 19 ft  19 feet 
3. 23 ft  23 feet 
4. 153 ft  153 feet 

AnswerEnter to expand or collapse answer.Answer expanded

Correct Response: A.

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Mathematics Subtest

Competency 2—Knowledge of geometry and measurement

A rectangular animal pen will be built using 200 meters of fencing. If one side of the rectangle is 60 meters, find the area of the pen.

Choose an answer

1. 1200 m²squared
2. 1400 m²squared
3. 2400 m²squared
4. 8400 m²squared

AnswerEnter to expand or collapse answer.Answer expanded

Correct Response: C.

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Mathematics Subtest

Competency 2—Knowledge of geometry and measurement

Which of the following geometric figures must have perpendicular diagonals?

Choose an answer

1. quadrilateral
2. parallelogram
3. rectangle
4. rhombus

AnswerEnter to expand or collapse answer.Answer expanded

Correct Response: D.

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Mathematics Subtest

Competency 2—Knowledge of geometry and measurement

Select the geometric figure that possesses all of the following characteristics:

1. quadrilateral
2. diagonals that bisect each other
3. at least one right angle

Choose an answer

1. rectangle
2. rhombus
3. trapezoid
4. triangle

AnswerEnter to expand or collapse answer.Answer expanded

Correct Response: A.

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Mathematics Subtest

Competency 2—Knowledge of geometry and measurement

Which of the following best describes the faces for the following figure?

The figure is a solid with 2 visible faces, one triangular and one rectangular. The triangular face has a base labeled A, a height labeled B, and two angles dimensioned as 45 degrees. The rectangular face has the triangle's hypotenuse as one edge. The opposite edge is labeled C, and the base is labeled A.

Choose an answer

1. 2 equilateral triangles, 1 square, 2 rectangles
2. 2 equilateral triangles, 2 squares, 1 rectangle
3. 2 isosceles triangles, 1 square, 2 rectangles
4. 2 isosceles triangles, 2 squares, 1 rectangle

AnswerEnter to expand or collapse answer.Answer expanded

Correct Response: D.

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Mathematics Subtest

Competency 2—Knowledge of geometry and measurement

Which of the following is the best estimate for the height of a kitchen refrigerator?

Choose an answer

1. 2 mm  2 millimeters 
2. 2 cm  2 centimeters 
3. 2 m  2 meters 
4. 2 km  2 kilometers 

AnswerEnter to expand or collapse answer.Answer expanded

Correct Response: C.

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Mathematics Subtest

Competency 2—Knowledge of geometry and measurement

Which of the following is the best estimate for the height of a mountain?

Choose an answer

1. 4 cm  4 centimeters 
2. 4 m  4 meters 
3. 4 km  4 kilometers 
4. 4 mm  4 millimeters 

AnswerEnter to expand or collapse answer.Answer expanded

Correct Response: C.

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Mathematics Subtest

Competency 2—Knowledge of geometry and measurement

How many square yards of carpet are needed to completely cover a rectangular floor that measures 15 feet by 9 feet?

Choose an answer

1. 8 yd²  8 yards squared 
2. 15 yd²  15 yards squared 
3. 45 yd²  45 yards squared 
4. 135 yd²  135 yards squared 

AnswerEnter to expand or collapse answer.Answer expanded

Correct Response: B.

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Mathematics Subtest

Competency 2—Knowledge of geometry and measurement

A 3-foot-wide wood deck will be built around a rectangular-shaped pool that measures 15 feet by 30 feet. The resulting shape is also rectangular. If the lumber costs $10 per square yard,  If the lumber costs 10 dollars per square yard,  what is the cost of the wood for the deck?

Choose an answer

1. $275 275 dollars 
2. $306 306 dollars 
3. $340 340 dollars 
4. $500 500 dollars 

AnswerEnter to expand or collapse answer.Answer expanded

Correct Response: C.

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Mathematics Subtest

Competency 2—Knowledge of geometry and measurement

A teacher covered the exterior of a rectangular prism-shaped box that measured 8 inches by 9 inches by 10 inches using one sheet of rectangular-shaped wrapping paper that measured 2 feet by 3 feet. There were no gaps or overlapping paper. How many square inches of wrapping paper were left over?

Choose an answer

1. 144
2. 380
3. 484
4. 622

AnswerEnter to expand or collapse answer.Answer expanded

Correct Response: B.

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Mathematics Subtest

Competency 2—Knowledge of geometry and measurement

A building contractor needs to compute the volume of air contained in a building with a rectangular floor, as shown in the figure below. The building is 20 feet long, 4 yards wide, 9 ¹/₂ feet high on two sides  9 and a half feet high on two sides  and 15 feet high from the floor to the peak. What is the volume of air in the building in cubic feet?

The figure shows a line drawing of a simple rectangular building with a peaked roof. The rectangular base is dimensioned as 4 yards wide and 20 feet long. One side wall is dimensioned as 9 and a half feet high. The end wall is dimensioned as 15 feet from the base to the peak of the roof.

Choose an answer

1. 1420 ft³  1420 feet cubed 
2. 2080 ft³  2080 feet cubed 
3. 2940 ft³  2940 feet cubed 
4. 3600 ft³  3600 feet cubed 

AnswerEnter to expand or collapse answer.Answer expanded

Correct Response: C.

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Mathematics Subtest

Competency 3—Knowledge of algebraic thinking and the coordinate plane

Which of the following is a solution of the inequality?

–3 < 2x + 1 < 5 negative 3 less than 2 x plus 1 less than 5

Choose an answer

1. –2negative 2
2. 0
3. 2
4. 4

AnswerEnter to expand or collapse answer.Answer expanded

Correct Response: B.

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Mathematics Subtest

Competency 3—Knowledge of algebraic thinking and the coordinate plane

Solve for x.

^{4x − 1}/₅ = 2x + 1 4 x minus 1 over 5 equals 2 x plus 1

Choose an answer

1. – ⁵/₃negative five thirds
2. –negative 1
3. ⁵/₃five thirds
4. 1

AnswerEnter to expand or collapse answer.Answer expanded

Correct Response: B.

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Mathematics Subtest

Competency 3—Knowledge of algebraic thinking and the coordinate plane

Find an algebraic expression equivalent to

Choose an answer

1. 6x² − x  6 x squared minus x 
2. 9x² − x  9 x squared minus x 
3. 12x² − 2x  12 x squared minus 2 x 
4. 18x² − x  18 x squared minus x 

AnswerEnter to expand or collapse answer.Answer expanded

Correct Response: B.

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Mathematics Subtest

Competency 3—Knowledge of algebraic thinking and the coordinate plane

A student argues that 4(x − 5) − (6x + 1) = –2x − 19.  4 left paren x minus 5 right paren minus left paren 6 x plus 1 right paren equals negative 2 x minus 19  Identify the first step that contains an error.

1. STEP 1    4(x − 5) − (6x + 1) = 4x − 20 − (6x + 1) STEP 1, 4 left paren x minus 5 right paren minus left paren 6 x plus 1 right paren equals 4 x minus 20 minus left paren 6 x plus 1 right paren
2. STEP 2    4x − 20 − (6x + 1) = 4x − 20 − 6x + 1 STEP 2, 4 x minus 20 minus left paren 6 x plus 1 right paren equals 4 x minus 20 minus 6 x plus 1
3. STEP 3    4x − 20 − 6x + 1 = 4x − 6x − 20 + 1 STEP 3, 4 x minus 20 minus 6 x plus 1 equals 4 x minus 6 x minus 20 plus 1
4. STEP 4    4x − 6x − 20 + 1 = –2x − 19 STEP 4, 4 x minus 6 x minus 20 plus 1 equals negative 2 x minus 19

Choose an answer

1. STEP 1
2. STEP 2
3. STEP 3
4. STEP 4

AnswerEnter to expand or collapse answer.Answer expanded

Correct Response: B.

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Mathematics Subtest

Competency 3—Knowledge of algebraic thinking and the coordinate plane

Find an algebraic expression equivalent to ^y/_x + ³/_2y y over x plus 3 over 2 y

Choose an answer

1. ^{y + 3}/_2xy y plus 3 over 2 x y
2. ^{2y + 3}/_2xy 2 y plus 3 over 2 x y
3. ^{2y2 + 3}/_2xy 2 y squared plus 3 over 2 x y
4. ^{2y2 + 3x}/_2xy 2 y squared plus 3 x over 2 x y

AnswerEnter to expand or collapse answer.Answer expanded

Correct Response: D.

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Mathematics Subtest

Competency 3—Knowledge of algebraic thinking and the coordinate plane

A consumer makes a down payment of $250 250 dollars  and plans to pay $60 per month for a phone service.  plans to pay 60 dollars per month for a phone service.  If m is the number of months, which of the following equations represents T, the total price paid?

Choose an answer

1. T = 60m + 190  T equals 60 m plus 190 
2. T = 60m + 250  T equals 60 m plus 250 
3. T = 190m + 60  T equals 190 m plus 60 
4. T = 250m + 60  T equals 250 m plus 60 

AnswerEnter to expand or collapse answer.Answer expanded

Correct Response: B.

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Mathematics Subtest

Competency 3—Knowledge of algebraic thinking and the coordinate plane

Which is true for x in the equation?

–5x − 2 ≤ –3x − 8  negative 5 x minus 2 is less than or equal to negative 3 x minus 8 

Choose an answer

1. x ≤ –3  x is less than or equal to negative 3 
2. x ≥ –3  x is greater than or equal to negative 3 
3. x ≥ 3  x is greater than or equal to 3 
4. x ≤ 3  x is less than or equal to 3 

AnswerEnter to expand or collapse answer.Answer expanded

Correct Response: C.

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Mathematics Subtest

Competency 3—Knowledge of algebraic thinking and the coordinate plane

Which of the following inequalities is the solution to the inequality shown?

10c + 5 < 4c − 1 10 c plus 5 is less than 4 c minus 1 

Choose an answer

1. c < –1 c is less than negative 1 
2. c > –1 c is greater than negative 1 
3. c < 1 c is less than 1 
4. c > 1 c is greater than 1 

AnswerEnter to expand or collapse answer.Answer expanded

Correct Response: A.

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Mathematics Subtest

Competency 3—Knowledge of algebraic thinking and the coordinate plane

Which of the following inequalities is the solution to the inequality shown?

5z − 9 ≤ 6z + 2  5 z minus 9 is less than or equal to 6 z plus 2 

Choose an answer

1. z ≤ –11 z is less than or equal to negative 11 
2. z ≥ –11 z is greater than or equal to negative 11 
3. z ≥ 1 z is greater than or equal to 1 
4. z ≤ 1 z is less than or equal to 1 

AnswerEnter to expand or collapse answer.Answer expanded

Correct Response: B.

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Mathematics Subtest

Competency 3—Knowledge of algebraic thinking and the coordinate plane

Which of the following equations can be used to find the number of gallons of a 50% alcohol solution,  50 percent, alchohol solution,  x, that should be mixed with 10 gallons of a 35% solution  that should be mixed with 10 gallons of a 35 percent solution  in order to get a 40% solution?  in order to get a 40 percent solution? 

Choose an answer

1. 0.85(x + 10) = 0.4x  0.85 left paren x plus 10 right paren equals 0.4 x 
2. 5 + 0.35x = 0.4(x + 10)  5 plus 0.35 x equals 0.4 left paren x plus 10 right paren 
3. 0.5x + 3.5 = 0.4(x + 10)  0.5 x plus 3.5 equals 0.4 left paren x plus 10 right paren 
4. 0.5(x + 10) + 0.35 = 0.4x  0.5 left paren x plus 10 right paren plus 0.35 equals 0.4 x 

AnswerEnter to expand or collapse answer.Answer expanded

Correct Response: C.

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Mathematics Subtest

Competency 3—Knowledge of algebraic thinking and the coordinate plane

Which of the following graphs represents a function?

Choose an answer

1. On an x, y graph, two curves equidistant from the x axis. The upper line is slightly lower in the center and the upper line is slightly higher in the center, as in two edges of a convex shape.
2. On an x, y graph, one U shaped curve, symmetrical around the y axis, with the lowest point below the x axis.
3. On an x, y graph, a circle around the origin.
4. On an x, y graph, two equal semicircles, with their diameters on the y axis, each with one point at the origin. One is in the upper right quadrant, and one is in the lower left quadrant, forming a reverse S shape.

AnswerEnter to expand or collapse answer.Answer expanded

Correct Response: B.

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Mathematics Subtest

Competency 3—Knowledge of algebraic thinking and the coordinate plane

Which of the following best describes why the following is a function?

For students in a class, assign their height.

Choose an answer

1. Each student has a student number.
2. Students will only have one value for their height.
3. The height of each student can be easily measured.
4. The chance of two students having the same height is small.

AnswerEnter to expand or collapse answer.Answer expanded

Correct Response: B.

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Mathematics Subtest

Competency 3—Knowledge of algebraic thinking and the coordinate plane

Which of the following relations is a function?

Each response is a pair of vertical ovoids, side by side. The left ovoid is labeled Input, and the right ovoid is labeled Output. Each has a set of numbers arranged inside in a vertical column. Arrows indicate a mapping from the Input numbers to the Output numbers.

Choose an answer

1. The input numbers are 3, 6, 9, and 12. The Output numbers are 1, 2, 3, and 4. Input 3 maps to output 1. Input 6 maps to output 1 and output 2. Input 9 maps to output 4. Input 12 maps to output 4.
2. The input numbers are 1, 5, and 13. The Output numbers are 2, 3, and 4. Input 1 maps to output 2. Input 5 maps to output 2. Input 13 maps to output 4.
3. The input numbers are 2, 4, 6, and 8. The Output numbers are 2, 5, 8, and 9. Input 2 maps to output 2 and output 5. Input 4 maps to output 5. Input 6 maps to output 5 and output 8. Input 8 maps to output 9.
4. The input numbers are 3, 8, and 15. The Output numbers are 5, 11, and 12. Input 3 maps to output 11. Input 8 maps to output 5. Input 15 maps to output 11 and output 12.

AnswerEnter to expand or collapse answer.Answer expanded

Correct Response: B.

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Mathematics Subtest

Competency 3—Knowledge of algebraic thinking and the coordinate plane

Which of the following input/output tables represents a function?

Choose an answer

1. table with 2 columns and 5 rows. row 1 column 1, input. row 1 column 2, output. row 2 column 1, input, 1. row 2 column 2, output, 3. row 3 column 1, input, 1. row 3 column 2, output, 5. row 4 column 1, input, 2. row 4 column 2, output, 30. row 5 column 1, input, 2. row 5 column 2, output, 50.
2. table with 2 columns and 5 rows. row 1 column 1, input. row 1 column 2, output. row 2 column 1, input, 1. row 2 column 2, output, 1. row 3 column 1, input, 2. row 3 column 2, output, 2. row 4 column 1, input, 1. row 4 column 2, output, 2. row 5 column 1, input, 2. row 5 column 2, output, 4.
3. table with 2 columns and 5 rows. row 1 column 1, input. row 1 column 2, output. row 2 column 1, input, 2. row 2 column 2, output, 2. row 3 column 1, input, 4. row 3 column 2, output, 6. row 4 column 1, input, 2. row 4 column 2, output, 8. row 5 column 1, input, 4. row 5 column 2, output, 12.
4. table with 2 columns and 5 rows. row 1 column 1, input. row 1 column 2, output. row 2 column 1, input, 2. row 2 column 2, output, 2. row 3 column 1, input, 4. row 3 column 2, output, 2. row 4 column 1, input, 6. row 4 column 2, output, 4. row 5 column 1, input, 8. row 5 column 2, output, 4.

AnswerEnter to expand or collapse answer.Answer expanded

Correct Response: D.

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Mathematics Subtest

Competency 3—Knowledge of algebraic thinking and the coordinate plane

The equation of line A is given by 2y − x = 6. 2 y minus x equals 6  Select the equation that could represent line B.

Two lines, labeled Line A and Line B, are plotted on an x, y graph. Line A extends from the upper right quadrant, through the upper left quadrant, into the lower left quadrant. Line B extends from the upper left quadrant, through the upper right quadrant, into the lower right quadrant.

Choose an answer

1. y = –x + 3 y equals negative x plus 3 
2. y = 3x + 8 y equals 3 x plus 8 
3. y = –2x + 7 y equals negative 2 x plus 7 
4. y = 0.5x + 3 y equals 0.5 x plus 3 

AnswerEnter to expand or collapse answer.Answer expanded

Correct Response: C.

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Mathematics Subtest

Competency 4—Knowledge of probability, statistics, and data interpretation

The children in a family are ages 2, 2, 6, 12, 16, 19, and 20. What is the mean of the children's ages?

Choose an answer

1. 2
2. 11
3. 12
4. 18

AnswerEnter to expand or collapse answer.Answer expanded

Correct Response: B.

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Mathematics Subtest

Competency 4—Knowledge of probability, statistics, and data interpretation

If the company would like to give the impression that its employees are highly paid, which salary statistics should it use?

Employee Salaries

employee salaries table

Title	Yearly salary
President	$120,000120,000 dollars
Office manager	40,000
Foreperson	60,000
Laborer 1	15,000
Laborer 2	15,000
Laborer 3	15,000
Laborer 4	15,000

Choose an answer

1. minimum
2. mode
3. median
4. mean

AnswerEnter to expand or collapse answer.Answer expanded

Correct Response: D.

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Mathematics Subtest

Competency 4—Knowledge of probability, statistics, and data interpretation

Eight pumpkins were picked from a garden. Their weights were 8 pounds, 3 pounds, 7 pounds, 16 pounds, 8 pounds, 13 pounds, 12 pounds, and 1 pound. How much greater than the mean was the heaviest pumpkin?

Choose an answer

1. 7 lb  7 pounds 
2. 7.5 lb  7.5 pounds 
3. 8 lb  8 pounds 
4. 8.5 lb  8.5 pounds 

AnswerEnter to expand or collapse answer.Answer expanded

Correct Response: B.

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Mathematics Subtest

Competency 4—Knowledge of probability, statistics, and data interpretation

A child has 26 pennies, 15 nickels, 21 dimes, and 18 quarters in a coin bank. When the child picks up the bank, a single coin falls out. What is the probability that the coin is a quarter?

Choose an answer

1. ³/₁₆three over sixteen
2. ⁹/₄₀nine over forty
3. ²¹/₈₀twenty one over eighty
4. ²⁶/₈₀twenty six over eighty

AnswerEnter to expand or collapse answer.Answer expanded

Correct Response: B.

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Mathematics Subtest

Competency 4—Knowledge of probability, statistics, and data interpretation

A consultant uses the following graph to justify why air-conditioning costs were higher in 2014 than in 2015. What aspect of the graph makes it misleading?

The graph is a bar graph. The vertical axis is labeled Number of Days Temperature above 80°F, with values marked from 50 to 55 in increments of 1. The horizontal axis is labeled Year, with values marked 2011, 2014, and 2015. The 2011 bar has a value of 50. The 2014 bar has a value of 53. The 2015 bar has a value of 51.

Choose an answer

1. The bars are different heights.
2. The vertical axis does not start at zero.
3. The scale on the horizontal axis is too large.
4. The increments on the vertical scale are not equal.

AnswerEnter to expand or collapse answer.Answer expanded

Correct Response: B.

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Mathematics Subtest

Competency 4—Knowledge of probability, statistics, and data interpretation

What is the median of the numbers in the following data set?

14, 14, 12, 8, 14, 8, 14, 4

Choose an answer

1. 10
2. 11
3. 13
4. 14

AnswerEnter to expand or collapse answer.Answer expanded

Correct Response: C.

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Mathematics Subtest

Competency 4—Knowledge of probability, statistics, and data interpretation

A basketball coach would like to know the total number of points the team scored in a 15-game season. Which of the following measures would provide the coach with the additional information needed to make this determination?

Choose an answer

1. mean
2. median
3. mode
4. range

AnswerEnter to expand or collapse answer.Answer expanded

Correct Response: A.

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Mathematics Subtest

Competency 4—Knowledge of probability, statistics, and data interpretation

A teacher gives a test and notes that the mean is 79 points and the standard deviation is 2 points. Which of the following is the best interpretation of this result?

Choose an answer

1. The median test score is equal to 79 points.
2. Most of the test scores are between 77 and 81.
3. Half of the test scores are greater than 81 points.
4. The lowest test score is 77 and the highest is 81.

AnswerEnter to expand or collapse answer.Answer expanded

Correct Response: B.

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Mathematics Subtest

Competency 4—Knowledge of probability, statistics, and data interpretation

The owner of a roller-skating rink needs to purchase women's skates. After reading that the mean women's shoe size is a seven, the owner decides to purchase mostly women's size seven skates. Which of the following statements, if true, best supports the owner's decision?

Choose an answer

1. The median shoe size is fairly small.
2. The range in shoe sizes is fairly large.
3. The mode of the shoe sizes is equal to the mean.
4. The mean shoe size is equal to the median shoe size.

AnswerEnter to expand or collapse answer.Answer expanded

Correct Response: C.

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Mathematics Subtest

Competency 4—Knowledge of probability, statistics, and data interpretation

A marketing company wants to determine consumer attitudes about a brand of soap in a particular city. Which of the following groups would make the best survey sample?

Choose an answer

1. customers who regularly purchase the product
2. registered voters who tend to vote in every election
3. residents who are selected using a random process
4. employees who work for one of the town's largest firms

AnswerEnter to expand or collapse answer.Answer expanded

Correct Response: C.

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Mathematics Subtest

Competency 4—Knowledge of probability, statistics, and data interpretation

An ecologist takes a 0.05-milliliter drop of water from a stream and examines it under a microscope. The ecologist counts 25 examples of a particular microscopic organism. Using ratio and proportion, the ecologist infers that there are 0.5 million of these organisms per liter of water in the stream.

Which of the following is the most important assumption that the ecologist makes with this inference?

Choose an answer

1. The drop of water was a representative sample.
2. No water evaporated while on the microscope slide.
3. The organisms were not affected by the microscope light.
4. All equipment was sterilized after the test was conducted.

AnswerEnter to expand or collapse answer.Answer expanded

Correct Response: A.

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Mathematics Subtest

Competency 4—Knowledge of probability, statistics, and data interpretation

A company's human resources department is tracking the percentage of employees out sick and the relative humidity of the air in the building. Which of the following conclusions can best be inferred using the following data?

The data is plotted on a scatter graph. The vertical axis is labeled Employees Out Sick left paren percentage symbol right paren, with values marked from 0 to 25 in increments of 5. The horizontal axis is labeled Relative Humidity left paren percentage symbol right paren, with values marked from 0 to 100 in increments of 20. The data points cluster tightly in a band from the origin to the upper right extreme of the graph.

Choose an answer

1. High values of relative humidity cause people to become sick.
2. When many employees are out sick, the relative humidity tends to be high.
3. Many employees are getting sick from the mold and mildew in the building.
4. The negative affect of overcast, sunless days is influencing employees' health.

AnswerEnter to expand or collapse answer.Answer expanded

Correct Response: B.

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Mathematics Subtest

Competency 4—Knowledge of probability, statistics, and data interpretation

The mayor of a city announces that there were 50% fewer automobile accidents this year than last year.  that there were 50 percent fewer automobile accidents this year than last year.  Which of the following is the most important additional piece of information needed to properly interpret these results?

Choose an answer

1. The total number of accidents each year.
2. The total number of cars registered in the city.
3. The traffic density on the roads where accidents occur.
4. The number of dangerous intersections that were redesigned.

AnswerEnter to expand or collapse answer.Answer expanded

Correct Response: A.

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