posted by Eric .
The mean score on a test was 280 and the standard deviation was 20. You want to pick the top 15%. What will be the minimum cutoff score to be in the top 15%?
You've posted five questions with no indication of your thoughts or efforts.
Please go back and add your ideas and attempts to the questions you've already asked. What don't you understand about them?
Do not post any more questions until you've done that.