Asked by Anonymous
Electricity bills in a certain city have mean $120.08. Assume the bills are normally distributed with standard deviation $14.40. Find the value that separates the lower 52% of the bills from the rest.
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/probability (.52) and its Z score. Insert in above equation and solve for score.
Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability (.52) and its Z score. Insert in above equation and solve for score.
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