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Have you seen this before? http://img.tfd.com/mk/D/X2604-D-41.png
but im just confused on how it works
basically it shows how much of the data is within so many standard deviations of the means. Your mean is 85, that's 0 deviations away. The standard deviation is 5, so 95 would be 2 standard deviations away. Does that make sense?
uh well im not really sure what a standard deviation is to be honest
it's a measure of how spread out the data is. If it's small, then a lot of the scores would be really close to the mean. If it's big, then the data is more spread out
so the data in this case would be spread out by 5
sort of. the graph up above only works for normal distributions, meaning most of the data is falls within 5 points of the mean. Specifically 68%
If we were to label the graph with numbers from your problem 85 would go in the middle because that's the mean
since the standard deviation is 5, you can add labels to the right increasing by 5 and labels to the left decreasing by 5
so to the the percentage from 85 to 95 you just add 34 and 13?
cool i got it! thank you so much!!