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Question 27 A manufacturer knows that their items have a normally distributed lifespan, with a mean of 7 years, and standard deviation of 1.1 years.

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Question 27 A manufacturer knows that their items have a normally distributed lifespan, with a mean of 7 years, and standard deviation of 1.1 years. If you randomly purchase 13 items, what is the probability that their mean life will be longer than 7 years? Round your answer to four decimal places

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