Asked by Anonymous
The scores on an economics examination are normally distributed with a mean of 66 and a standard deviation of 14. If the instructor wishes to assign a grade of A to the top 10% of the class, what is the lowest score a student may have and still obtain an A?
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 (.10) related to a Z score. Then insert the values to solve for the score.
Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion (.10) related to a Z score. Then insert the values to solve for the score.
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