Question

Assume that adults have IQ scores that are normally distributed with a mean of 105 and a standard deviation 15. Find the probability that a randomly selected adult has an IQ less than 123.

The probability that a randomly selected adult has an IQ less than 123 is ____.

Answer 1

.8849 or 88.49% have score ess than 123

Explanation:

Answer:

88.49 % have less than 123 (or .8849)

Explanation:

123 is 18/15 = 1.2 S.D. ABOVE the mean z-score +1.2

from z- score table +1.2 this is .8849 or 88.49 %