Section D Section D Checkpoint

Problem 1

What does standard deviation measure? How would a distribution with a large standard deviation compare to a distribution with a small standard deviation?

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Solution

Standard deviation measures variability. A distribution with a large standard deviation would be more spread out than a distribution with a small one.

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Sample Response

Standard deviation measures variability. A distribution with a large standard deviation would be more spread out than a distribution with a small one.

Problem 2

Describe what an outlier is. Do outliers affect mean or median more?

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Solution

Sample response: An outlier is an extreme value in a data set that is more than 1.5 times the interquartile range away from the nearest quartile. Outliers affect mean more than median.

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Sample Response

Sample response: An outlier is an extreme value in a data set that is more than 1.5 times the interquartile range away from the nearest quartile. Outliers affect mean more than median.