he years of education for self-employed individuals is normally distributed with a mean of 7.5 years and a standard deviation of 3.3 years. If 38 self-employed individuals are polled, what is the probability that the mean years of education of this sample is at most 7.4 years?

A First Course in Probability (10th Edition)
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Chapter1: Combinatorial Analysis
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The years of education for self-employed individuals is normally distributed with a mean of 7.5 years and a standard deviation of 3.3 years. If 38 self-employed individuals are polled, what is the probability that the mean years of education of this sample is at most 7.4 years?

Round your answer to at least three decimals.

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