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March 29, 2015

March 29, 2015

Posted by **tristen** on Monday, June 18, 2012 at 3:02pm.

- statistics -
**MathGuru**, Monday, June 18, 2012 at 5:28pmUse a confidence interval formula:

CI90 = mean ± 1.645(sd/√n)

...where ± 1.645 represents the 90% confidence interval using a z-table, sd = standard deviation, √ = square root, and n = sample size.

Plug your data into the formula to calculate the confidence interval.

I hope this will help get you started.

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