A random sample of 115 observations produced a sample mean of 31. Find the critical and observed values of z for the following test of hypothesis using α=0.05. The population standard deviation is known to be 8 and the population distribution is normal. H0: μ=28 versus H1: μ>28. Round your answers to two decimal places. zcritical = zobserved =
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Step 1: State the null and alternative hypotheses H0: μ=28 (null hypothesis) H1: μ>28 (alternative hypothesis) Show more…
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