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Using an evenly distributed data population of 8,000 samples, how many Would fall between a Z-score...

Using an evenly distributed data population of 8,000 samples, how many Would fall between a Z-score of -0.5 and +0.5?

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Answer #1

P (    -0.500   < Z <    0.500   )                       
= P ( Z <    0.500   ) - P ( Z <   -0.50   ) =    0.6915   -    0.3085   =    0.3829  
excel formula for probability from z score is =NORMSDIST(Z)

total values Would fall between a Z-score of -0.5 and +0.5 = 0.3829*8000 = 3063.4 ≈ 3064

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