Question
Asked Apr 12, 2019
Find the indicated IQ score. The graph to the right depicts IQ scores of adults, and those scores are normally distributed with a mean of 100 and a
standard deviation of 15.
0.6
The indicated la score, x, is。(Round to one decimal place as needed )
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Find the indicated IQ score. The graph to the right depicts IQ scores of adults, and those scores are normally distributed with a mean of 100 and a standard deviation of 15. 0.6 The indicated la score, x, is。(Round to one decimal place as needed )

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Expert Answer

Step 1

The z-score:

The z-score of a normally distributed random variable, X, with mean μ and standard deviation σ, at the point x, is given as:

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Step 2

Calculation:

The normally distributed IQ score, X has mean μ = 100 and standard deviation σ = 15.

According to the given graph, the probability of X, above the value x, is 0.6; that is, P (X > x) = 0.6....

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