month Of the past year in order to analyze rainfall patterns. QUESTION 7 A manufacturer claims their batteries have a mean "life" of 138.5 hours with a standard deviation of 21.7 hours. Round probabilities four (4) decimal places. Part C may be counted incorrect until your instructor grades it. A. What is the probability of randomly selecting a sample of 45 batteries that when tested have a mean "life" less than 137 hours? Can you use the CLT? Probability: B. What is the probability of randomly selecting a sample of 64 batteries that when tested have a mean "life" greater than 145.5 hours? Can you use the CLT? Probability: C. Why is it not possible to determine the probability of randomly selecting a sample of 25 batteries that when tested have a mean "life" less than 135 hours