[Solution] A sample mean, sample size, and papulation standard deviation are given. Use the one—mean z—test to perform the required hypothesis test at the
Question: A sample mean, sample size, and papulation standard deviation are given. Use the one—mean z—test to perform the required hypothesis test at the given significance level. Use the critical -value approach.
\(\overline{\mathrm{x}}=21.2, \mathrm{n}=11, \sigma=7.7, \mathrm{H}_{0}: \mu=18.7 ; \mathrm{H}_{\mathrm{a}}: \mu \neq 18.7, \alpha=0.01\)
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