Asked by jax
The average family spends $78 at the grocery store each week with a standard deviation of $25
How much money per week would a family need to spend to be in the 90th percentile? Explain, in context, what this means.
How much money per week would a family need to spend to be in the 90th percentile? Explain, in context, what this means.
Answers
Answered by
PsyDAG
90th percentile = Z = 1.28
1.28 = Z = (score-mean/SD
Plug in the other values to find the score.
1.28 = Z = (score-mean/SD
Plug in the other values to find the score.
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