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A Random Sample of 100 Observations from a Normal Population

Question 126

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A random sample of 100 observations from a normal population whose standard deviation is 50 produced a mean of 75.Does this statistic provide sufficient evidence at the 5% level of significance to infer that the population mean is not 80?

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H0: μ = 80 vs.H1: μ ≠ 80 Rejecti...

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