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December 20, 2014

December 20, 2014

Posted by **Brian** on Wednesday, August 1, 2012 at 9:10pm.

I know u: 3.12, sx: .09, n:48, c:.95

What is the formula I use to find the answer? Can anyone please leave a step by step on how to do it so I can learn and do other problems?

- Statistics -
**MathGuru**, Friday, August 3, 2012 at 6:48pmFormula:

CI95 = mean ± 1.96(sd/√n)

...where ± 1.96 represents the 95% interval using a z-table; sd = standard deviation; n = sample size

Your data:

mean = 3.12

sd = .09

n = 48

Plug the values into the formula and determine the interval.

I hope this will help get you started.

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