You manage a bookstore. Your competitor claims that the average textbook at their bookstore costs less than $100. You want to test this claim. You randomly sample 40 books and get the average cost of $95 and the sample standard deviation ofthis sample to be $20. a. Run the hypothesis test at the standard alpha level of 5% and copy and paste the results below. Make sure you show the Ho, Ha, critical value, test statistic, pvalues and decision. b. Summarize your results at the 0.05 alpha level significance level. Use the spreadsheet on Emplo data. Sort your data as needed and copy and paste special into the correct sheet on the ESP4 worksheet. a. Complete the table below. Males with Education :12 Females with Education > 12 Count Average salary Sample SD of salary a. Using the values in part a, can we show that the average salary for males with more than 12 years of education is significantly greater than $40,000 at the 0.05 alpha level? Copy and Paste the needed section of the ESP4 sheet to show your results. Summarize your results. b. Using the values in part a, can we show that the average salary for females with more than 12 years of education is significantly less than $35,000 at the 0.0-5 alpha level? Copy and Paste the needed section of the ESP4 sheet to show your results. Summarize your results