A sample mean, sample size, and population 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...

Extracted text: A sample mean, sample size, and population 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. x= 54, n= 38, o = 5.6, Ho: H = 56; Ha: H < 56,="" a="0.05" .....="" o="" a.="" z="-" 2.20;="" critical="" value="-" 1.645;="" do="" not="" reject="" ho="" o="" b.="" z="-" 2.20;="" critical="" value="-" 1.96;="" reject="" ho="" oc.="" z="-" 0.36;="" critical="" value="-" 1.645;="" do="" not="" reject="" ho="" o="" d.="" z="-2.20;" critical="" value="-" 1.645;="" reject="">