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February 1, 2015

February 1, 2015

Posted by **Kya** on Thursday, April 5, 2012 at 12:10am.

- statistics -
**MathGuru**, Thursday, April 5, 2012 at 7:06pmThe following is a hint for you to get started.

Use a confidence interval formula for proportions:

CI95 = p ± (1.96)(√pq/n)

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

Using your data:

p = 166/200

q = 1 - p

n = 200

Convert fractions to decimals. Calculate using the formula above.

I'll let you take it from here.

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