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January 31, 2015

January 31, 2015

Posted by **jessica** on Thursday, October 27, 2011 at 12:45am.

- statistics -
**MathGuru**, Thursday, October 27, 2011 at 5:01pmUse a confidence interval formula for proportions:

CI95 = p + or - (1.96)(√pq/n)

...where √ = square root, p = x/n, q = 1 - p, and n = sample size.

Note:

x = 20

n = 1513

Remember to convert all fractions to decimals before calculating the interval.

I hope this will help.

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