11. An environmentalist wishes to survey Canadians to determine what percentage support strict environmental controls on the Oil and Gas Industry. The environmentalist randomly picks n=900 Canadians, and finds that 642 favour strict environmental controls on the Oil and Gas Industry. (a) Find a 95% confidence interval for p without using a bootstrap sample. Use at least four decimal points for your lower and upper bounds. Lower Bound = Upper Bound =

(b) Interpret the meaning of the interval you found in part (a) . The proportion of all Canadians The proportion of all Canadians sampled all people who support strict environmental controls on the Oil and Gas Industry is ? somewhere between outside of the interval

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% and %. (Enter your answer to at least two decimals.)