Posted by bibi on .
Empirical rule the authors generac generator produces voltage amounts with a mean of 125.0 volts and a standard deviation of 0.3 volt,and the voltage have a bellshape distribution.using the empirical rule,what is the approximate percentage of voltage amounts between 124.4 volts and 125.6 volts?

math 
bobpursley,
You are within two standard deviations. What is the rule?
http://davidmlane.com/hyperstat/z_table.html 
math 
bibi,
Empirical Rule