We want to test the following null and alternative hypothese…
We want to test the following null and alternative hypotheses about a population proportion: Ho: p = 0.70 Ha: p > 0.70 We observe 400 successes in a sample of 500 observations. Assume that it is valid to use large-sample procedures in this problem. Calculate the test statistic needed to test the null hypothesis. Should we reject or not reject Ho: p = 0.70 if we use a significance level of α = 0.05? Explain.