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8. Having a sample size of n = 100 and o= 10 population standard deviation, we test the hypothesis that the mean is equal to

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8. Having a sample size of n = 100 and o= 10 population standard deviation, we test the hypothesis that the mean is equal to 100, namely Ho: p = 100. Assuming that the observations are normally distributed we found that the sample mean is 150. The [Z or t] test statistic is equal to a) 1.645 b) 1.960 C 50 d) 2.13

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