Asked by Anonymous
The average score on a particular exam is determined to be 84.35 with a standard deviation of 7.4. Assume the scores are normally distributed. Applicants with exam scores in the lower 10% directed to special retraining.
What is the minimum score required not to be directed to retraining?
What is the minimum score required not to be directed to retraining?
Answers
Answered by
PsyDAG
You want the highest 90%.
Z = (score-mean)/SD
Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion. Use that Z score in the above equation. (Remember that the Z score will be negative.)
Z = (score-mean)/SD
Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion. Use that Z score in the above equation. (Remember that the Z score will be negative.)
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