Asked by Diane
With a spent average of $90.00 with a standard deviation of $15.00, what is the maximum amount that you can spend and still be in the lowest 20%?
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 (.2000) and its Z score. Insert the Z score and other data into the equation above to find the raw score.
Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion (.2000) and its Z score. Insert the Z score and other data into the equation above to find the raw score.
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