Asked by Nakita
Scores on a test are normally distributed and have a mean of 75 and a standard deviation of 4.2. What score does a student need in order to rank in the top 20%?
Answers
Answered by
Steve
play around here to learn how the Z table stuff works:
http://davidmlane.com/hyperstat/z_table.html
http://davidmlane.com/hyperstat/z_table.html
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