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Assume that adults have IQ scores that are normally distributed with a mean of 102.9 and...

Assume that adults have IQ scores that are normally distributed with a mean of 102.9 and a standard deviation of 15.1 Find the probability that a randomly selected adult has an IQ greater than 119.8
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Answer #1

We have given that the IQ scores of adults are normally distributed with mean, and standard deviation, , and we are asked to find the probability that a randomly selected student has IQ greater than , so in order to find the probability we first have to find the z-score.

So the z-score is calculated as

Now,

So the probability that a randomly selected adilt has an IQ greater than 119.8 is

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