Statistics
posted by Ryan .
The weight of a bag of corn chips is normally distributed with a mean of 22
ounces and a standard deviation of 0.5 ounces.
The probability that a bag of corn chips weighs more than 21 ounces is?
The probability that a bag of corn chips weighs between 20.75 and 23.25
ounces is?

z = (2122)/.5
z = 2
1.0062 = .9938
z = (20.7522//.5
z = 2.5
z =( 23.2522)/.5
z = 2.5
.9938.0228 = .9710 
Statistics  Kuai, Sunday, October 27, 2013 at 8:55pm
z = (2122)/.5
z = 2
1.0228 = .9710
z = (20.7522//.5
z = 2.5
z =( 23.2522)/.5
z = 2.5
.9938.0062= .9876