Z P Po Po 1 PO n 0 80 0 85 1 77 0 85 10 85 160 1 77 Step 10 A lower tail test is being performed so the area to the left of the test statistic z 1 77 is needed Use the standard normal table to find the p value for this test statistic rounding the result to four decimal places p value Enter a number 0 85 Submit Skip you cannot come back Need Help Read It