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In a hypothesis test with hypotheses Ho:? 45, a random sample of 60 elements selected from the population produced a mean of 46.8. Assume that

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In a hypothesis test with hypotheses Ho:? 45, a random sample of 60 elements selected from the population produced a mean of 46.8. Assume that o = 7.1, and that the test is to be made at the 2.5% significance level.What is the critical value of z?1.96-1.65-1.961.65

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