(a) p 0.78 Before a p-value can be found, the test statistic must be calculated and the type of test must be determined. The following hypotheses were given for a sample of 160 items and a sample proportion of p = 0.78. Ho: p 0.85 H: p < 0.85 Since this test is for a population proportion, the z test statistic will be found. This calculation is given below where p is the sample proportion, Po is the hypothesized population proportion, and n is the sample size. Z= P-Po Po(1-Po The value for Po is the hypothesized population proportion we are testing for. Here, we have Po There was a sample of 160 items given, so we have n = Submit Skip (you cannot come back) Need Help