?

Statistics and Probability

Free Version

Upgrade subject to access all content

Easy

Empirical Rule

STATS-ELBBKX

Google collects mountains of data on Web browsing. If a particular batch of data is normally distributed, what would we expect regarding the approximate proportion of the data within certain bounds?

Select ALL that apply.

A

Roughly 2 out of 3 observations would fall within 1 standard deviation of the mean.

B

Roughly 19 out of 20 observations would fall within 2 standard deviations of the mean.

C

Roughly 99 out of 100 observations would fall within 3 standard deviations of the mean.

D

Roughly 68% of observations would fall within 2 standard deviations of the mean.