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November 5th, 2011, 02:48 PM   #1
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Mean and standard deviation

Hey everyone,


You will have to forgive me, my stats is a bit rusty =)

I have 2 pieces of information about a study - the mean (15.4) and standard deviation (5.0). Am I correct to imply that anything within +/- 5 of the mean will represent ~64% of the population, +/- 10 of the mean would be nearly 99%?

Thanks!

Jared
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November 5th, 2011, 02:58 PM   #2
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Re: Mean and standard deviation

For a normal distribution, the 2? domain is about 95%, not 99%.
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