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A supermarket claims that the average wait time at the checkout counter is less than 8 minutes. Assume that we know that
Posted: Sun Jul 10, 2022 10:23 am
by answerhappygod
- A Supermarket Claims That The Average Wait Time At The Checkout Counter Is Less Than 8 Minutes Assume That We Know That 1 (65.59 KiB) Viewed 74 times
A supermarket claims that the average wait time at the checkout counter is less than 8 minutes. Assume that we know that the standard deviation of wait times is 2.5 minutes. We will test at a significance level of 10%. Consider HO: mu >= 8 H1: mu < 8 A random sample of 50 customers yielded an average wait time of 7.8 minutes. What is the critical value for the Zstat (Zstat is the Z-test statistic)? (Provide two decimal places)