Mathematics, 03.04.2020 17:47 Guidomigoo3x

Researchers collected a simple random sample of the times that 81 college students required to earn their bachelor's degrees. This sample has a mean of 4.8 years and a standard deviation of 2.2 years. Use a 0.05 significance level to test the claim that the mean time for all college students is greater than 4.5 years.

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