Question 1031090
need to calculate the z-value for the sample mean
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z-value = (Sample mean - population mean) / standard deviation of the population
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z-value = (52 - 55) / 9.2 = −0.326086957 approx -0.33
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consult table of z-values for the probability
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Probability ( X < 52 ) = 0.3707
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