The weights of a random sample of containers that are supposed to weigh 100

grams are listed below.

105.2 103.5

99.1. 97.8

98.6 100.3

101.2 96.0

The sample statistics are: = 100.213, = 3.025

Can we infer, at the 5% significance level, that the variance of container weights is

greater than 7? Assume the required conditions are satisfied.

Complete calculations manually and in excel.