15. Given a sample with a mean of 57 and a standard deviation of 8, calculate the following probabilities using Excel. Notice this is not a standard normal distribution. Round your answer to three decimals points, e.g. 0.753. Pr(X < 58.2 )

Q: 60.91-2.856

A: We want to find the value  60.91-2.856=? 

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