normal distributions

Physics
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On a standardized national exam, the mean score was 55.5 and the standard deviation was 6.2. What percentage of the students scored higher than 61.7?

May 27th, 2015

Standard Deviation (SD) is the measure of spread of the numbers in a set of data from its mean value.

55.5+6.2=61.7

6.2/100 is the variance

50-6.2=43.8

=43.8%

May 27th, 2015

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May 27th, 2015
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May 27th, 2015
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