Ch 4 Comparing Quantitative Data Diplays

The dotplots compare the number of hours a group of teenagers spent on two activities.

Select the answer that is NOT true.

• The data for exercise has a lower center than the data for video games.

• Both dotplots appear to be skewed right.

• Both dotplots appear to have outliers.

• The time spent on video games had a greater range than the time spent on exercise.

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Compare the two dotplots. Which statement is true?

• Boys and girls had the same spread/range in their times.

• Boys generally had longer times than girls.

• The center of the boys' times is lower than the center for the girls times.

• Both dotplots are skewed right.

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Compare the two histograms, select the true statement.

• The histogram on the left has a larger standard deviation than the histogram on the right.

• The histograms appear to have roughly the same center and symmetric distributions.

• The histogram on the right has a larger spread than the histogram on the left.

• The IQR for the two histograms will be equal.

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The back-to-back stemplot shows the heart rate of a group of people before and after exercise. Select the false statement below.

• Both pulse rate stemplots are skewed right.

• The pulse rates stemplot 'after exercise' has a higher center than the stemplot when resting.

• The stemplot for 'resting' has a larger spread/range than 'after exercise'

• Both stemplots appear to have outliers.

Which group has a larger interquartile range?

• Group A

• Group B

• They're the same

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Which group has a higher median reaction time?

• Group A

• Group B

• They're the same

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Which group contained the person with the fastest response time?

• Group A

• Group B

• They're the same

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Select the answer that is a true statement.

• 25% of Group A's reaction times are greater than roughly 100% of Group B's.

• 50% of Group A's reaction times are greater than 75% of Group B's.

• 75% of Group A's reaction times are greater than 50% of Group B's

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What is the IQR of the Cruisers?

• 4

• 6

• 13

• 9

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Which car club has the higher median?

• Cruisers
• Car Hops

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