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400 students were randomly sampled from a large university, and 289 said they did not get enough sleep. (a) Conduct a hypothesis test to check
400 students were randomly sampled from a large university, and 289 said they did not get enough sleep.
(a) Conduct a hypothesis test to check whether less than two thirds of students are not getting enough sleep, and use a significance level of = 0.01.
(b) Would your decision in part (a) change if you were using a level of significance of = 0.05? Explain.
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