Posted by **Anonymous** on Monday, May 7, 2012 at 10:44am.

In a random sample of 112 State College students, 41 students reported being current smokers.

a) Calculate the 95% confidence interval for the proportion of State College students who smoke.

- statistics -
**MathGuru**, Monday, May 7, 2012 at 11:11am
Use a confidence interval formula for proportions. Here is one:

CI95 = p ± (1.96)(√pq/n)

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

Hint: x = 41, n = 112

(Convert all fractions to decimals.)

I hope this will help get you started.

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