mean score for class is 100 with standard deviation of 15

Standard deviation, mean, variance, z-scores, t-tests, etc.
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maggiemagnet
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mean score for class is 100 with standard deviation of 15

Postby maggiemagnet » Sat Feb 28, 2009 10:54 pm

You have just completed grading the final exams for your algebra class and find that the mean score is 100 with a standard deviation (SD) of 15. If one student has a score of 115, by how many standard deviations does his grade differ from the average for the class?

Is this as simple as SD = 15, so he's one standard deviation above? :confused:

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stapel_eliz
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Postby stapel_eliz » Sun Mar 01, 2009 12:31 am

It's just that simple! :wink:

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maggiemagnet
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Re: mean score for class is 100 with standard deviation of 15

Postby maggiemagnet » Sun Mar 01, 2009 7:08 pm

Thank you! lol


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