Consider the observed frequency distribution for the following set of grouped random variables:

Random Variable, x Frequency, fo Less than 80 10 80 to under 100 14 100 to under 120 19 120 and more 7 Total 50 Perform a chi-square test using a = 0.05 to determine if the observed frequencies follow the normal probability distribution with m = 100 and s = 20.

Applications AppendixLO1