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anonymous
 one year ago
How do I calculate the probability of a value being between 60.5 and 70.5 when the standard deviation is 2.5 and the mean is 65.5?
anonymous
 one year ago
How do I calculate the probability of a value being between 60.5 and 70.5 when the standard deviation is 2.5 and the mean is 65.5?

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campbell_st
 one year ago
Best ResponseYou've already chosen the best response.2well 70.5 is 65.5 + 2x 2.5 so 70.5 is 2 standard deviations above the mean 60.5 is 65.5  2x2.5 so 60.5 is 2 standard deviations below the mean... attached is an image of the standard Normal curve... 0 is the mean so you want the total of the percentages between 2 and 2 hope it helps

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0ok, so if I ever have a problem like that, I just need to find how many standard deviations is the mean from the bounds and then add the percentages related to each standard deviation?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0the sum would be 95%. Wow! I was busting my brain over nothing!
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