Comparing Variances Question Help
The McBurger company's management is interested in whether there is a difference in the standard deviation in services times for customers who use the drive-through window versus those who go inside to the service counter. A sample of drive-through customers and a sample of inside-counter customers were selected. The time (minutes) it took for each customer to be served was recorded. The following statistics are computed:
Based on a significance level of , determine if there is a difference in the standard deviation in service time.
I'm assuming null hypothesis is var(drivethrough)/var(insider) = 1 and alternative hypothesis is var(drivethrough)/var(insider) /= 1, but I'm not sure of what to do after this. If anyone could post the steps I'll try to follow along, thanks!
Re: Comparing Variances Question Help
F or variance ratio test.
Originally Posted by youngb11
220.127.116.11. F-Test for Equality of Two Standard Deviations