Ch. 12 Test

Which example yields an unbiased sample of a school’s student body?

• Survey every tenth student from a complete student list.

• Survey the students in the computer lab during their lunch break.

• Ask students to complete a survey at the library.

• Survey every fifth senior in their mathematics class.

A campaign director sorts a list of registered voters by hometown, and then selects 20 names from each town. Classify the sample.

• biased

• self-selected

• stratified

• systematic

The number of daily red light violations for two weeks were

8, 3, 3, 5, 11, 6, 5, 4, 3, 2, 4, 6, 3, 2.

Which best describes the distribution of this data?

• symmetric distribution

• positively skewed distribution

• negatively skewed distribution

• simple distribution

Find the mean absolute deviation of

{7, 8, 12, 3, 6}.

• 2.24

• 2.4

• 9.2

• 12

Find the standard deviation of

{11, 16, 17, 12}.

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How many different vehicles are possible if you choose one each of 2 transmissions, 7 body styles, and 4 engines?

• 13

• 22

• 28

• 56

In how many ways can the top six seeds (rankings) be chosen from nine players on a tennis team?

• 362,880

• 60,480

• 720

• 84

How many different groups of 6 shirts can be formed from 10 shirts for a display?

• 16

• 60

• 210

• 151,200

How many combinations of three books can be selected from 40 books?

• 59,280

• 9880

• 80

• 42

There are 15 cherry, 17 grape, and 14 orange juice boxes in the cooler. Find the probability of randomly selecting two grape juice boxes without replacement.

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