For some of the courses my TAs dont give the class rank, but only mean and standard deviation. But I can calculate my percentile from this information in the following manner:
1. Calculare standard score - http://en.wikipedia.org/wiki/Z_score
2. From the table in http://www.medfriendly.com/standardscoretopercentileconversion.html you can find your score percentile. This is a measure of how many standard deviations away from the mean you are.
We thus calculate the percentile rank of a score which is the percentage of scores in its frequency distribution which are lower. A normal distribution of scores is assumed and hence this is an approximation. There are many people who have wanted this information and this post is as much for their benefit as for my future reference.
1. Calculare standard score - http://en.wikipedia.org/wiki/Z_score
2. From the table in http://www.medfriendly.com/standardscoretopercentileconversion.html you can find your score percentile. This is a measure of how many standard deviations away from the mean you are.
We thus calculate the percentile rank of a score which is the percentage of scores in its frequency distribution which are lower. A normal distribution of scores is assumed and hence this is an approximation. There are many people who have wanted this information and this post is as much for their benefit as for my future reference.
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