SOLUTION: Given a chi-squared distribution with degrees of freedom = 25, you want to bound a middle portion of the distribution symmetrically; e.g. you want the same amount of probability ab

Question 912884: Given a chi-squared distribution with degrees of freedom = 25, you want to bound a middle portion of the distribution symmetrically; e.g. you want the same amount of probability above and below the middle portion. What are those upper and lower bounds if the middle portion is 90%? 95%?
Answer by ewatrrr(24785) (Show Source): You can put this solution on YOUR website!
the middle portion is 90%...upper and lower bounds: 5% where invNorm(.05) = -invNorm(.95)
the middle portion is 95%...upper and lower bounds: .025%
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