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QNT/275-A random sample of 121 observations produced

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June 7th, 2024

A random sample of 121 observations produced a sample mean of 31. Find the critical and observed values of z for the following test of hypothesis using ?=0.05. The population standard deviation is known to be 8 and the population distribution is normal.H0: ?=28 versus H1: ??28.Round your answers to two decimal places.

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