SOLUTION: Find the area of the shaded region. The graph depicts IQ scores of adults, and those scores are normally distributed with a mean of 100 and a standard deviation of 15 (as on the W

Question 998964: Find the area of the shaded region. The graph depicts IQ scores of adults, and those scores are
normally distributed with a mean of 100 and a standard deviation of 15 (as on the Wechsler test).
Shows a graph with left side shaded and it stops at 110
Answer by rothauserc(4718) (Show Source): You can put this solution on YOUR website!
you need to calculate the z-value associated with IQ 110 and consult z-table values for the area (probability),
z-value = (110 - mean) / std. dev.
z-value = (110 - 100) / 15 = 0.666666667 approx 0.67
Probability(Pr) ( X < 110 ) = 0.7486

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