0 Question 11 v E 4 pts '5') 1 6) Detail Testing: H0111 = 12 H1111 9'9 12 Your sample consists of 27 values, with a sample mean of 12.2. Suppose the population standard deviation is known to be 4.65. a) Calculate the value of the test statistic, rounded to 2 decimal places. 2 = C] b) At or = 0.025, the rejection region is Oz > 1.96 Oz 2.24 Oz 1.96 Oz 2.24 c) The decision is to O Reject the null hypothesis O Fail to reject the null hypothesis O Accept the alternative hypotheis O Accept the null hypothesis d) Supposed you mistakenly failed to reject the null hypothesis in this problem, what type of error is that? O Type | OType ll . Question 12 V > B 4 pts '0 1 G Details The annual rainfall in a certain region is approximately normally distributed with mean 42.1 inches and standard deviation 5.3 inches. Round answers to the nearest tenth of a percent. a) What percentage of years will have an annual rainfall of less than 44 inches? C]% b) What percentage of years will have an annual rainfall of more than 38 inches? [:]% c) What percentage of years will have an annual rainfall of between 37 inches and 43 inches? [:96 > Next