Are women's feet getting bigger? Retailers in the last 20 years have had to increase their stock of larger sizes. Wal-Mart Stores, Inc., and Payless Shoe Source, Inc., have been aggressive in stocking larger sizes, and Nordstrom's reports that its larger sizes typically sell out first. Assuming equal variances, at α = .025, do these random shoe size samples of 12 randomly chosen women in each age group show that women's shoe sizes have increased?

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Born in 1980: 875 8.5 8.5 8 5 9.5 7.5 8 8 85 9 Born in 1960: 85 75 8 875 75 75 8 78 78