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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?
for each of the following situations indicate how you might use ratio or regression estimation.a estimate the
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