Asked by danette
if the mean is 20 and the standard deviation is 4, at least what percentage will have a mean between 15 and 25?
Answers
Answered by
PsyDAG
Z = (score-mean)/SD
Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion between the two Z scores.
Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion between the two Z scores.
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