Suppose interest lies in estimating the proportion of people that believe climate change is a serious problem for a current and future generations. In addressing this question, a student who has taken HLTH 204, obtains a large representative sample from Waterloo and estimates the 90% confidence interval (C!) as (0.834. 0.887). What is the proper interpretation (it any) of this Cl? a) Cannot be determined since normality is not given. b) The probability that this CI will NOT contain the true proportion is 10%. c) On repeated sampling, such confidence intervals would contain the true proportion 90% of the time. d) The probability that this CI will contain the true proportion is 90%