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8.5 Small-Sample Test of Hypothesis about a Population Mean

The average undergrad cost for tuition, fees, room and board at two-year colleges 5 years ago was $13,252.  This year a random sample of 20 schools had a mean (adjusted for inflation) of $15,560 and a standard deviation of $3,500.  Use a 1% significance level to test the claim that tuition, fees, and room and board (adjusted for inflation) at two-year colleges has risen over the past 5 years.         


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