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QUESTION 11 ..... [1.5 marks | Wenatchee Valley Telephone company claims that the standard deviation of the lengths of time it takes an incoming telephone call to be transferred to the correct office is less than 1.4 minutes. A random sample of 25 incoming telephone calls has a standard deviation of 1.1 minutes. At a = 0.1, is there enough evidence to support the company's claim? Assume the population is normally distributed. Solution. Please write your detailed solution here: Please write your answer in the boxes Critical value(s): Test value(s) Should we reject the null hypothesis