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Assume that adults have IQ scores that are normally distributed with a mean of mu equals...

Assume that adults have IQ scores that are normally distributed with a mean of mu equals 105 and a standard deviation sigma equals 20. Find the probability that a randomly selected adult has an IQ less than 129. Click to view page 1 of the table. LOADING... Click to view page 2 of the table. LOADING... The probability that a randomly selected adult has an IQ less than 129 is nothing. ?(Type an integer or decimal rounded to four decimal places as? needed.)

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Solution :

We assume that adults have IQ scores that are normally distributed with a mean of mu equals 105 and a standard deviation sigma equals 20. To find the probability that a randomly selected adult has an IQ less than 129.

Thus , we have the information from the data given :

Let be the IQ scores of the adults. Thus , .

Here , we are to find :  

The probability that a randomly selected adult has an IQ less than 129 = 0.8849..............(Ans)

  

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