Answer the following. (a) Suppose a 95% confidence Interval for the difference of means contains both positive and negative numbers. Will a 99% confidence Interval based on the same data necessarily contain both po ositive and negative numbers? Explain, what about a 90% confidence Interval? Explain. Both the 90% and 99% Intervals will contain positive and negative numbers because they will be wider than the 95% Interval. The 90% Interval will also contain positive and negative numbers because it will be wider than the 95%% Interval. The 99% may or may not contain positive and negative numbers because it will be narrower than the 95%% interval. ( The 99% Interval will also contain positive and negative numbers because it will be wider than the 95%% Interval. The 90% may or may not contain positive and negative numbers because it will be narrower than the 95%% interval Both the 90% and 99%% intervals may or may not contain positive and negative numbers because they will be narrower than the 95%% Interval. (b) Suppose a 95% confidence interval for the difference of proportions contains all positive numbers. Will a 99%% confidence interval based on the same data necessarily contain all positive numbers as well? Explain. What about a 90% confidence Interval? Explain. O The 99% Interval will also contain only positive numbers because it will be narrower than the 95% interval. The 90% may or may not contain only positive numbers because it will be wider than the 95's interval. @ Both the 90% and 99% Intervals may or may not contain only positive numbers because they will be wider than the 95% Interval. O The 90%% Interval will also contain only positive numbers because it will be narrower than the 95% Interval, The 99%% may or may not contain only positive numbers because it will be wider than the 95 interval Both the 909% and 99% Intervals will contain only positive numbers because they will be narrower than the 95% Interval, Need Help? Read