Question 457118
he mean (μ) of the scale is 55 and the standard deviation (σ) is 14. Assuming that the scores are normally distributed, what is the PROBABILITY that a score falls below 39?
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z(39) = (39-55)/14 = -1.1429
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P(x < 39) = P(z < -1.1429) = 0.1265
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Cheers,
Stan H.