A production manager at a wall clock company wants to test their new wall clocks. The designer claims they have a mean life of 15 years with a standard deviation of 5 years. If the claim is true, in a sample of 37 wall clocks, what is the probability that the mean clock life would be less than 13.8 years? Round your answer to four decimal places. Answer How to enter your answer (opens in new window) Tables Keypad Keyboard Shortcuts

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