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Confidence Interval

 
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Confidence Interval, C language
kgrahora
31 Mar, 2008 - 06:02 PM
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Hello!!!
I have to write a program to calculate confidence interval. I wrote a program that calculates mean, and standard deviation and now I have to calculate the confidence interval.

The formula for confidence interval is:
mean +/- z * standard deviation/sqrt(number of samples)

Ok my question is how do I do the +/- that has to be below each other. And my program must output something like this:

mean +/- confidence interval
73.125 +/- 65.684

Thank you smile.gif

This post has been edited by kgrahora: 31 Mar, 2008 - 07:07 PM
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GWatt
RE: Confidence Interval
31 Mar, 2008 - 08:23 PM
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There's a numerical value that is the ± character.
If your program is using the extended ascii set, that value is 241. of course, you can always copy and paste ±
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