The may 1 2007 college retirement equity fund cref, Ask an Expert

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The May 1, 2007, College Retirement Equity Fund (CREF) prospectus lists the following sample returns on $1 invested in two of the fund's accounts, per year.5

Equity Index Account ($): 1.636, 1.441, 0.973, 1.055, 1.400

Money Market Account ($): 1.169, 1.273, 0.976, 0.998, 0.953

Assuming these data are random samples, is there statistical evidence that one account is better than the other?

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