Step 11 If the found p-value is less than or equal to a given level of a, then the null hypothesis will be rejected in favor of the alternative. The p-value was found to be 0.0384 and we are to compare the p-value to a = 0.05. Since the p-value is less than or equal to less than or equal to 0.05, the null hypothesis, Ho, will is sufficient evidence to conclude that the population proportion is less than 0.85, p < 0.85. will be rejected in favor of the alternative. Therefore, there Step 12 (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 Po(1-Po) 0.89 n 0.85(1-0.85) 160