SOLUTION: find the z scores that bound the middle 60% of the area under the standard normal curve

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Question 1058905: find the z scores that bound the middle 60% of the area under the standard normal curve
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
For the middle to contain 60%, then the tails must contain 40% total or each must have 20%.
So find a such that P%28a%29=0.2 then you'll know that P%28a%3Cx%3C-a%29=0.6
P%28a%29=0.2
a=-0.84162
So,
P%28-0.842%3Cx%3C0.842%29=0.6