Chapter 1 Review

College students were chosen at random and asked if they would prefer to have a SUV or a Sports Car. The results of the survey are given in the table.

What percentage of students who are male prefer a sports car?

• 16.25%

• 35%

• 46.4%

• 65%

We collected data from 50 female students. Which variable is categorical?

• number of siblings

• hair color

• hours per week spent in class

• age

Which of the following does not reveal the shape of a distribution?

• Histogram

• Boxplot

• Stemplot

• Dotplot

What summarizes the spread of the central 50% of the data?

• Range

• IQR (inter-quartile range)

• Distribution

• Outlier

Given the follow data set, find any outliers:

18, 7, 29, 25, 32, 45, 28, 30

• 7 only

• 45 only

• 7 and 45

• No outliers

What is true of the data shown in the histogram?

I. The distribution is approximately symmetric

II. The mean is greater than the median

III. The distribution is skewed right.

• I only

• I and II

• III only

• II and III

Use the stem and leaf plot to find the inter-quartile range (IQR).

• 14

• 37

• 74

• 88

The double box plot shows the test scores for two different math classes. Use the information to determine which of the following statements is NOT true.

• only one of the data sets is symmetric

• the median in 1st period is greater than the median in 5th period

• the highest test score is the same in both classes

• the interquartile range (IQR) is larger in 1st period than in 5th period

What is the relative frequency of people who prefer Comedy movies?

• 4%

• 10%

• 20%

• 25%

Your Stats teacher tells you your test score was the 3^rd quartile for the class. Which is true?

I. You got 75% on the test.

II. You can’t really tell what this means without knowing the standard deviation.

III. About 25% of your classmates got a score that was higher than yours.

• I only

• II only

• III only

• None of the above