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Homework #4 1. Find the critical value zo to construct a confidence interval at 85%. For each of the following construct a confidence interval for both 90% and 95%. That means two per problem with the information given. Problems 2, 3, and 4. 2.) x = 31.39, 0 = .80, n = 82 3.) From a random sample of 24 months from January 2006 through December 2016, the mean number of tornadoes per month in the United States was about 100. Assume the population standard deviation is 114