SOLUTION: let expectation = 100 , standard deviation = 15. Calculate the central range of IQ scores that contains 2/3 of the population. The minimal IQ score that belongs to this range

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Question 912516: let expectation = 100 , standard deviation = 15.
Calculate the central range of IQ scores that contains 2/3 of the population.
The minimal IQ score that belongs to this range is:____.
The maximal IQ score that belongs to this region is:___.

Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
let expectation = 100 , standard deviation = 15.
Calculate the central range of IQ scores that contains 2/3 of the population.
1/6 on either side
15invNorm(1/6) + 100 = X, minimal score = 15(-.967) + 100 = 85.5 0r 86
15invNorm(5/6) + 100 = X, maximal score = 15 (.967) + 100 = 114 .5 0r 115