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AP Stats

Authored by Barbara White

Mathematics

11th Grade - University

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10 questions

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1.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

The heights of American men aged 18 to 24 are approximately Normally distributed with a mean of 68 inches and a standard deviation of 2.5 inches. Only about 5% of young men have heights outside the range

65.5 - 70.5 in

63 - 73 in

60.5 - 75.5 in

58 - 78 in

none of the above

2.

MULTIPLE CHOICE QUESTION

3 mins • 5 pts

The heights of American men aged 18 to 24 are approximately Normally distributed with a mean of 68 inches and a standard deviation of 2.5 inches. About what percentage of the men are over 70.5 inches tall?

2.5

5

16

32

68

3.

MULTIPLE CHOICE QUESTION

3 mins • 5 pts

Media Image

For this density curve, which statement is true?

The area under the curve between 0 and 1 is 1

The density curve is symmetric

The density curve is skewed right

The density curve is Normal

None of the above is correct

4.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

The area under the Standard Normal curve corresponding to -0.3 < z < 1.6 is

.3273

.4713

.5631

.9542

None of the above

5.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Media Image

The graph at right is a Normal probability plot for the amount of rainfall (in acre-feet) obtained from 26 randomly selected clouds that were seeded with silver oxide. Which of the following statements about the shape of the rainfall distribution is true?

The distribution is Normal

The distribution is Uniform

The distribution is skewed left

The distribution is skewed right

The distribution is Symmetrical

6.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

The distribution of the time it takes for different people to solve a certain crossword puzzle is strongly skewed to the right, with a mean of 30 minutes and a standard deviation of 15 minutes. The distribution of z-scores for those times is

Normally distributed, with mean 30 and standard deviation 15

Skewed to the right, with mean 30 and standard deviation 15

Normally distributed, with mean 0 and standard deviation 1

Skewed to the right, with mean 0 and standard deviation 1

Skewed to the right, but need more information to find mean and standard deviation

7.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Media Image

The cumulative relative frequency graph shows the distribution of lengths (in cm) of fingerlings at a fish hatchery. The interquartile range for this distribution is

approximately:

0.18 to 0.85 cm

5 to 7 cm

5.5 to 6.7 cm

1.2 cm

2 cm

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