Question

The mean I.Q. test scores of IT student was 100 and the standard deviation 16. Assuming that
the distribution was normal, find,
(i) What percent of the student had I.Q. under 80?
(ii
) Between what limit the I.Q. of middle 40% of the student lay?
(iii) What percent of the student had I.Q. with the range u£1.960?
[Ans: 10.56%, 95-105, 95%]
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Answer 1

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