Unit 8 End of Unit Review

Select all the true statements.

• Given a box plot, it is always possible to calculate the mean of the data.

• Given a box plot, it is always possible to calculate the median of the data.

• Given a box plot, it is always possible to construct a corresponding dot plot.

• Given a dot plot, it is always possible to construct a corresponding box plot.

• Given a histogram, it is always possible to construct a corresponding box plot.

Find the mean of this data set.

• The mean is less than 5

• The mean is equal to 5

• The mean is greater than 5

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?

• 50

• 13

• 0

• 25

This box plot displays information about the number of text messages some students sent one day.

What is the IQR (interquartile range)?

• 55

• 10

• 1929

• 3

Two groups went bowling. Here are the scores from each group.

Which group shows greater variability?

• Group A

• Group B

 Ten students each attempted 10 free throws. This list shows how many free throws each student made.

8, 5, 6, 6, 4, 9, 7, 6, 5, 9

What is the median number of free throws made?

• 5

• 6

• 7

• 8

Jada asked some students at her school how many hours they spent watching television last week, to the nearest hour. Here is a box plot and a histogram for the data she collected.

About how many students did Jada ask? 

• 100

• 400

• 300

• 200

Jada asked some students at her school how many hours they spent watching television last week, to the nearest hour. Here is a box plot and a histogram for the data she collected.

Is the mean or the median a more appropriate measure of center for this data set?

• Median 

• Mean

Jada asked some students at her school how many hours they spent watching television last week, to the nearest hour. Here is a box plot and a histogram for the data she collected.

Can Jada use these data displays to find the exact median?

• Yes 

• No