Asked by sarah
Suppose that is normally distributed with mean 90 and standard deviation 12. What value of does only the top 20% exceed?
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 and its Z score. Put Z and other values into the equation above and solve for the score.
Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion and its Z score. Put Z and other values into the equation above and solve for the score.
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