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Observation from a normal population

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1. A researcher has taken a random sample of 8 observation from a normal population. Sample mean and standard deviations are 75 and 50 respectively. Using the 6 steps process of hypothesis testing.

-Can he infer at the 10% significance level that the population mean is less than 100?

-Can he infer at the 10% significance level that the population mean is less than 100 if population standard deviation is 50?

-Review the answers in (i) and (ii) and explain why the test statistics differed.

Reference no: EM133083246

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