(d) p = 0.89 Recall the previously determined values po = 0.85 and n = 160. Now we are to find the test statistic for a new sample proportion, p = 0.89. Use these values to find the test statistic, rounding the result to two decimal places. z= P-Po Poll-Po) 0.89 n 0.85 = 1.42 0.85(1-0.85) 160 1.42 0.85 Step 13 A lower tail test is being performed, so the area to the left of the test statistic z = 1.42 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=