6-10) To determine the monthly retail sales, a sample of 136 stores was taken. The mean annual sales was found to be $296,438 and the sample standard deviation was found to be $37,971. 6. Find the t value corresponding to 0.025 in the upper tail 7. Construct the 95% confidence interval for the mean annual sales. 8. Set up the hypothesis to test the claim that the annual monthly retail sales are less than $300,000. Ho: Ha: 9. Find the standardized test statistic for testing this hypothesis. 10. Find the p-value related to this test.