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test scores have a mean of 100 with deviation of 20

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test scores have a mean of 100 with deviation of...

Percentage of scores less than 100

distribution with a mean of 100 and deviation of 20
use 68-95-99.7 rule to answer what percentage of scores less than 100.

asked Aug 6, 2012 in Statistics Answers by anonymous

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1 Answer

In the normal distribution, 50% of the scores are below the mean and 50% above regardless of the standard deviation. Since the mean is 100 and 100 is the value under test, 50% of the results are less than 100.

answered Apr 12, 2022 by Rod Top Rated User (1.1m points)

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