An investigator wants to estimate caffeine consumption in high school students. How many students would be required to estimate the proportion of students who consume coffee? Suppose we want the estimate to be within 5% of the true proportion with 95% confidence.

Question

Alpha = ________
Z= ________
p= ________
Effect Size = ________
n= ________

Answer 1

alpha = a= 0.05
Z0.025 = 1.96
p = 0.5
q = 1-p = 0.5
E = 0.05
Effect size
= 384.16
n = 385