Question

1. a)Suppose average monthly sales for retail locations across the United States are approximately normally distributed with unknown variance. We took a sample of size 50 and found  ̄x= 12018.5 and s^2= 5245. Using this, conduct a hypothesis test with α= 0.05 to test the null hypothesis that the mean is 12000 vs. the

alternative hypothesis that it is not. For full credit, state the null and alternative hypothesis, the test statistic, the rejection region, and your conclusion.

b) Using the setup from part a, conduct a hypothesis test to check whether or not the population variance is σ^2= 5000 using α= 0.05.

Answer 1

Here p value is calculated using excel

Here P value is calculated using excel