Question 1

Based on the relative frequency histogram of systolic blood pressure for people aged 25-40, what is the approximate percentage of people with systolic blood pressure readings between 110 and 139 mm Hg (inclusive)?

Accepted Answer

$$75\%$$

Question 2

Using the home sale price frequency table, what is the class width for the given frequency distribution?

Accepted Answer

$$31.0$$

Question 3

The histogram of log(assets) for 71 companies is shown. Which of the following best describes the shape of the distribution?

Accepted Answer

The distribution is approximately normal.

Question 4

Given the cumulative frequency table for car speeds, how many cars were recorded with speeds between 60 and 89 (inclusive)?

Accepted Answer

$$60$$

Question 5

From the boxplot of test scores, what is the interquartile range (IQR)?

Accepted Answer

$$81 - 58 = 23$$

Question 6

According to the boxplot, what is the median test score?

Accepted Answer

$$72$$

Question 7

In the home sale price frequency table, what is the midpoint of the class interval $$142.0 - 172.9$$?

Accepted Answer

$$\frac{142.0 + 172.9}{2} = 157.45$$

Question 8

If a car is selected at random from the cumulative frequency table, what is the probability that its speed is less than 60?

Accepted Answer

$$\frac{20}{100}$$

Question 9

Based on the relative frequency histogram for systolic blood pressure, which interval contains the highest proportion of people?

Accepted Answer

$$110-119$$\ mm\ Hg$

Question 10

From the boxplot, which of the following statements is true about the distribution of test scores?

Accepted Answer

The distribution is slightly skewed to the right.

Question 11

Using the home sale price frequency table, what is the relative frequency of homes sold in the $$173.0 - 203.9$$ thousand dollar range if there were 28 total sales?

Accepted Answer

$$\frac{10}{28}$$

Question 12

Given the cumulative frequency table, what is the frequency of cars with speeds between 90 and 119?

Accepted Answer

$$100 - 80 = 20$$

Question 13

If the minimum test score is 25 and the maximum is 98, what is the range of the test scores shown in the boxplot?

Accepted Answer

$$98 - 25 = 73$$

Question 14

Based on the histogram of log(assets), which of the following is most likely true about the mean and median of the data?

Accepted Answer

The mean and median are approximately equal.

Statistics Test Review: Visual Data Interpretation and Descriptive Statistics

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