Unit 9 Checkpoint

Which statement about the data is true?

• The interquartile range is 7, and the range is 17.

• The interquartile range is 7, and the range is 11.

• The interquartile range is 2.75, and the range is 17.

• The interquartile range is 2.75, and the range is 11.

The list shows the growth in centimeters of 12 plants during one week.

6, 7, 7, 8, 8, 8, 9, 9, 10, 11, 11, 14

Which box plot best displays a summary of these data?

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Which statement is supported by the data in the dot plot?

• More than half of the birds have wing lengths of less than 50 millimeters

• There are more birds that have a wing length of 54 millimeters than birds that have a wing length of 46 millimeters.

• Fewer than half of the birds have wing lengths greater than 48 millimeters.

• There are more birds that have a wing length of 52 millimeters than birds that have a wing length of 51 millimeters.

Which percentage bar graph best represents the data?

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Which statement is NOT supported by the data in the table?

• More than 5% of the children chose “other” as the favorite type of cereal.

• Oatmeal is the favorite type of cereal for 15% of the children.

• Cold cereal is associated with the mode for the favorite type of cereal.

• Grits is the favorite type of cereal for 20% of the children.

Based on the histogram, which statement must be true?

• There are 5 employees who have been at their current position for 30–35 months

• There are 6–11 employees who have been at their current position for 15 months.

• Half of the employees have been at their current position 18 or more months

• Half of the employees have been at their current position 11 or fewer months

Which statement is best supported by the data in the box plot?

• Approximately 50% of the finishing times were less than 25 minutes.

• Approximately 25% of the finishing times were greater than 28 minutes.

• Approximately 25% of the finishing times were in the interval 20–22 minutes

• Approximately 75% of the finishing times were in the interval 15–30 minutes.