Data and Statistics Review Iqr Mad

What is the mode of the scores?

• 24

• 14

• 34

• 30

What is the range of the data shown?

• 85

• 90

• 80

• 70

How many people have four books in their desks?

• 2

• 3

• 4

• 5

What percent of students picked vanilla as their favorite ice cream?

• 24%

• 76%

• 20%

• 50%

Ten students each attempted 10 free throws. This list shows how many free throws each student made. What is the IQR (interquartile range)?

• 8

• 5

• 3

• 13

Here’s a dot plot of a data set. Which statement is true about the mean of the data set?

• The mean is less than 5.

• The mean is equal to 5.

• The mean is greater than 5.

• There is not enough information to determine the mean.

The air quality was tested in many office buildings in two cities. The results of the testing is shown in these box plots. A level of less than 50 parts per million is considered healthy. A level of 50 or more parts per million is considered unhealthy.

Select all the statements that must be true.

• The lowest recorded measurement was in city Q.

• All buildings tested in city P are in the healthy range.

• The mean for city P is greater than the mean for city Q.

• The range for city Q is greater than the range for city P.

• The median for city P is greater than the median for city Q.

This box plot displays information about the number of text messages some students sent one day. What is the median number of texts sent by students?

• 10

• 20

• 14

• 26

This box plot displays information about the number of text messages some students sent one day. What is the IQR (interquartile range)?

• 10

• 20

• 14

• 26

This box plot displays information about the number of text messages some students sent one day. Is this data set symmetric? Explain how you know.

• Yes. It is equal on both sides of the median.

• Yes. The whiskers are the same width.

• No. The bottom quartile is much wider than the top one.

• No. The top quartile is much wider than the bottom quartile.