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In: Statistics and Probability

Intelligence quotient (IQ) scores are often reported to be normally distributed with a mean of 100...

Intelligence quotient (IQ) scores are often reported to be normally distributed with a mean of 100 and a standard deviation of 15.   What is the probability of a random person selected from this population having an IQ score of less than 95?

Solutions

Expert Solution

Let X denotes the IQ scores.

X ~ N( = 100, =15)

We have to find the probability P(X<95)

                     (Value from z table)

The probability of a random person selected from this population having an IQ score of less than 95 is 0.3707.

z table :

orchestra answered 2 years ago
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