SOLUTION: The scale of scores on an IQ test is approximately Normal with mean 100 and standard deviation 15. The organization MENSA, which calls itself "the high-IQ society," requires an IQ

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Question 856982: The scale of scores on an IQ test is approximately Normal with mean 100 and standard deviation 15. The organization MENSA, which calls itself "the high-IQ society," requires an IQ score of 130 or higher for membership.
What percent of adults would qualify for membership?
Question 11 options:

2.5%

5%

95%
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,

mean 100 and standard deviation 15

P(x ≥  130) = 1 - P(z < 30/15) = 1 - NORMSDIST(2) = 1 - .9772 = .0228  0r 2.28%