Posted by Anonymous on .
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,
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.