A Trucking Firm Suspects That the Variance for a Certain $\alpha$

question 60

Essay

A trucking firm suspects that the variance for a certain tire is greater than 1,000,000. To check the claim, the
firm puts 101 of these tires on its trucks and gets a standard deviation of 1200 miles. If α $\alpha$ = 0.05, test the
trucking firmʹs claim using confidence intervals.