The weights of tennis balls are normally distributed, with the mean being 5.15 ounces and the standard deviation being 0.10. What percentage of the balls weigh within one standard deviation of the mean?
50%
68%
95%
99.7%

Question

The weights of tennis balls are normally distributed, with the mean being 5.15 ounces and the standard deviation being 0.10. What percentage of the balls weigh within one standard deviation of the mean?
50%
68%
95%
99.7%

jim_thompson5910 · Answer

use the empirical rule http://www.hyginsberg.byethost32.com/docs/empirical_rule.png?ckattempt=1

jim_thompson5910 · Answer

This part
`The weights of tennis balls are normally distributed, with the mean being 5.15 ounces and the standard deviation being 0.10.`
is unneeded info