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    Independent samples t-test

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    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 ShoeSource, 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? (See The Wall Street Journal, July 17,2004.)

    ShoeSize1
    Born in 1980: 8 7.5 8.5 8.5 8 7.5 9.5 7.5 8 8 8.5 9
    Born in 1960: 8.5 7.5 8 8 7.5 7.5 7.5 8 7 8 7 8

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    Solution Summary

    This solution uses an independent samples t-test to compare the mean shoe sizes of two groups.

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