is not sufficient evidence to conclude that the population proportion is less than 0.85, p < 0.85. Step 9 (c) p = 0.80 Recall the previously determined values P = 0.85, and n = 160. Now we are to find the test statistic for a new sample proportion, p = 0.80. Use these values to find the test statistic, rounding the result to two decimal places. z= P-Po Po(1-Po) n 0.80 0.85 0.85(1 -0.85) 160 Enter a number. Submit Skip (you cannot come back)