A well-known IQ test is standardized to have a mean of 100 and a standard deviation of 15 for children of any particular age level. Out of a typical sample of 500 children of a given age, how many would we expect to obtain IQ scores:
(a)above 130?
(b)above 150?
(c)below 80?
(d)between 90 and 110?
(e)outside the limits 80 and 120?

Question

Quizplus · Accepted Answer

The Answer is (a)11
(b)less than 1 (.25)
(c)46
(d)249
(e)92.

A Well-Known IQ Test Is Standardized to Have a Mean