SOLUTION: Find the (two) z-scores that bound the middle 40% of the standard normal distribution.

Question 644043: Find the (two) z-scores that bound the middle 40% of the standard normal distribution.
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Find the (two) z-scores that bound the middle 40% of the standard normal distribution.
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That block of probability has a left tail of 0.30 and a right tail of 0.30.
Find the z-value with a left tail of 0.30
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InvNorm(0.30) = -0.5244
The z-value with a right tail of 0.30 = 0.5244
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Cheers,
Stan H.
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