Suppose that we will randomly select a sample of 64 measurements from a population having a mean equal to 20 and a standard deviation equal to 4. Calculate the probability that we will obtain a sample mean less than 19.385; that is, calculate P( < 19.385) (Use the rounded standard error to compute the rounded Z-score used to find the probability. Round your answer to 4 decimal places. Round z-scores to 2 decimal places.)

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A: From the provided information, Mean (µ) = 20 Standard deviation (σ) = 4 X~N (20, 4)

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