View Full Version : Empirical Rule

10-27-2009, 04:11 AM
I am having the most difficult time solving this, please assist.

A placement test has a mean of 65 and a standard deviation of 2. A histogram of the data shows that the distribution is bell-shaped. Using the Empirical Rule, what two values have about 95% of the curve between them?

10-27-2009, 06:54 AM
The Empirical Rule says that 95% of the data is within 2 standard deviations of the mean.