1.The table to the right shows the results of a survey in which 2553 adults from Country A, 1140 adults from Country B, and 1064 adults from Country C were asked if human activity contributes to global warming. Complete parts (a), (b), and (c).

country A=67% country B=87% country c=91%

a.) Construct a 99% confidence interval for the proportion of adults from Country Upper A who say human activity contributes to global warming. _,_

2.The table shows the results of a survey in which separate samples of 400 adults each from the East, South, Midwest, and West were asked if traffic congestion is a serious problem in their community. Complete parts (a) and (b).

East-37% South 33% Midwest 26% West 53%

a)Construct a 95% confidence interval for the proportion of adults from the West who say traffic congestion is a serious problem. The 95% confidence interval for the proportion of adults from the West who say traffic congestion is a serious problem is _,_

3. Construct the confidence interval for the population mean u

c=0.98 x=7.5 o=0.3 n =46

A) A 98% confidence interval for is _,_