Problem 10.6 (altered version) Are women '5' feet getting bigger? Retailers in the last 20 years have had to increase their stock of larger sizes. Wall-Mart Stores, Inc and Payless ShoeSource, Inc have been aggressive in stocking larger sizes and Nordstrom '5 reports that its larger sizes typically sell out rst. Assuming equal variances (stdev), at alpha=0. 025, do these random shoe size samples of 12 randomly chosen women in each age group show that women '5 shoe sizes have increased? Born in 1980: 8, 7.5, 7.5, 8.5, 8, 7, 9, 7.5, 8, 8, Born in 1960: 8.5, 7.5, 8.5, 8, 7.5, 7, 7.5, 8, 8, State the null and alternative hypothesis (you MUST label which is H0 and which is H1) What is the critical value? What is the test statistic? Do you reject or fail to reject? What is your conclusion? rue.0579