Question 8

Which of the following statements are true? I. When generating confidence intervals and when doing significance tests we use the same expression for the standard error. II. If zero is in the confidence interval for the difference between two proportions, we have evidence that the two population proportions could be the same. Hi. When we do a significance test for the difference between two proportions. we're justified in pooling our estimates of the population proportion only if the sample sizes are large. 0 II and Ill only 0 land lll only