1. A. When you construct a confidence interval for the difference between two proportions, what do you use as an unbiased estimate of the difference between the two proportions? (1 point) B. What's the formula for the standard error of the difference between the estimates of the population proportions ( SE, -;, ) used in a confidence interval for the difference between two proportions? (1 point) 2. A. What's the null hypothesis for a significance test about the difference between two proportions? (1 point) B. What's the formula for the pooled estimate of the population proportions ( p ) used in calculating a test statistic for a significance test about the difference between two proportions? (1 point) C. When you conduct a significance test about the difference between two proportions, what's the formula for the standard error of the difference between the population proportion estimates ( SE. )? (Hint: Remember that, when you're conducting significance tests about the difference between two proportions, the standard errors are pooled.) (1 point) 3. Why are we justified in pooling the population proportion estimates and the standard error of the difference between these estimates when we conduct significance tests about the difference between population proportions? (1 point)