A random sample of size 81 is drawn from a population with a standard deviation of 12. If only 18% of the time a sample mean greater than 300 is obtained, what is the mean of the population? (Round your answer to 2 decimal places, e.g. 145.75.) P Appendix A Statistical Tables

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A: Find the inverse of fx=x+49-3x

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A: We have given that Mean(µ) = 72.6Standard deviations (σ) = 4.78X ~ N (µ, σ )= N(72.6, 4.78)

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