Question 1

What is the total number of households represented in the histogram above?

Accepted Answer

110

Question 2

Find the class midpoint for the scores interval 95-99.

Accepted Answer

$$96.5$$

Question 3

Given the frequency distribution of home sale prices, what are the class boundaries for the class 80.0-110.9?

Accepted Answer

$$79.90, 110.95$$

Question 4

Determine the width of each class in the employee years of service frequency distribution.

Accepted Answer

$$4$$

Question 5

What is the mean number of cousins from the following data: 18, 12, 7, 13, 7, 2, 7?

Accepted Answer

$$9.4$$ cousins

Question 6

Find the median temperature from the following data: 26, 29, 33, 59, 67, 68, 78.

Accepted Answer

$$59^\circ F$$

Question 7

Given the test scores of 40 students summarized in a frequency distribution, what is the mean score?

Accepted Answer

$$71.8$$

Question 8

Calculate the standard deviation for the sample data: 19, 6, 19, 15, 14, 5, 18, 15, 13.

Accepted Answer

$$5.2$$

Question 9

The top nine scores on the organic chemistry midterm are: 66, 43, 86, 45, 68, 62, 29, 62, 90. What is the standard deviation?

Accepted Answer

$$21.2$$

Question 10

Jen's monthly phone bill is normally distributed with a mean of $$70 and a standard deviation of 9. $$What percentage of her phone bills are between $$43$$ and $$97$$?

Accepted Answer

$$99.7\%$$

Question 11

The mean of a set of data is $$5.73$$ and its standard deviation is $$3.44. $$Find the $$z$$ score for a value of $$13.87.$$

Accepted Answer

$$2.67$$

Question 12

Which score corresponds to the higher relative position: a score of $$92 on a $$test with a mean of $$71$$ and a standard deviation of $$15$$, or a score of $$688 on a $$test with a mean of $$493$$ and a standard deviation of $$150$$?

Accepted Answer

A score of 92

Question 13

Find the mode(s) for the given sample data: 7.11, 7.41, 7.56, 7.11, 7.88, 7.99, 7.62.

Accepted Answer

$$7.11$$

Question 14

Find the variance for Jeanne's quiz scores: 17, 18, 1, 20, 13.

Accepted Answer

$$46.2$$

Question 15

A stemplot is created from the following marathon lap data: 46, 65, 55, 43, 51, 48, 57, 30, 43, 49, 32, 56. Which of the following best represents the correct stemplot?

Accepted Answer

3 | 0 2
4 | 3 3 6 8 9
5 | 1 5 6 7
6 | 5

Step-by-Step Guidance for Introductory Statistics Multiple Choice Review

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