Question

Researchers will create a confidence interval for the proportion of all first-grade children who are overweight. The chance that this method will provide a correct result is determined by the

a. sample size.

b. level of confidence

c. sample mean.

d. population standard deviation.

Answer 1

The level of confidence is given by: $100(1-\alpha)$

Based on $100(1-\alpha)\%$ confidence interval, we can say that if confidence interval of the same sample size are formed, then the true proportion will lie in the interval $100(1-\alpha)\%$ times.

Hence option B.