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Data were collected on number of credit hours earned from a random sample of 40 JMU...

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Statistics

  1. Data were collected on number of credit hours earned from arandom sample of 40 JMU students. The mean was 57.2 and thestandard deviation was 8.9. Conduct a test to determine whether thetrue mean number of credit hours earned differs from 55.0, allowinga Type I error rate of 0.05. Assume that the distribution of thenumber of credit hours earned is normal. Show your full work. Youmay not use your calculator’s built-in function.

Answer & Explanation Solved by verified expert
3.8 Ratings (570 Votes)
SolutionThe null and alternative hypothesis areH0 550H1 550n 40 572s 89 005Since population SD is    See Answer
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