http://www.ck12.org Chapter 6. Normal Distribution Curves
b. The values within 2 standard deviations of the mean are from 3, 200 −( 2 × 150 )calories to 3, 200 + ( 2 × 150 )
calories, or from 2,900 calories to 3,500 calories.
c. The values within 3 standard deviations of the mean are from 3, 200 −( 3 × 150 )calories to 3, 200 + ( 3 × 150 )
calories, or from 2,750 calories to 3,650 calories.
Practice
For each of the following, complete the statement. Fill in the first blank in each statement with the mean and the
second blank in each statement with the standard deviation. Assume that the standard deviation is the difference
between the mean and the first tick mark to the left of the mean.
- “The typical measurement is approximately __ kilograms, give or take __ kilograms.”