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6 What is the critical value for a right tailed test, with alpha = .7704? 7 If x = 727, n = 1978, find the point estimate for the population proportion p-hat. 8 Find the critical value, if c = .98 and n = 13. (Sigma unknown.) 9 Construct the confidence interval for the population mean u, if c = .98, x-bar = 22, o = .4, and n = 36. 10 If Z sub c = 1.28, o = 36, and E = 2, calculate the minimum sample size