Homework Help: college statistics

Posted by melba on Sunday, June 3, 2012 at 4:51pm.

a set of data is normally distributed with a mean of 1000 and a standard deviation of 100.what would be standard score for a score of 900.what percent of scores is betyween 1000 and 900.what would be percentile rank for a score of 900.

college statistics - PsyDAG, Monday, June 4, 2012 at 1:06pm
Z is one type of standard score.

Z = (score-mean)/SD

Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion related to the Z score. Multiply by 100 to change proportion to percent.

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