Two random samples are taken from among high school students, one from female

Two random samples are taken from among high school students, one from female students and another from male students. Both groups are asked if they have a cell phone. A summary of the sample sizes and number in each group answering ``no'' is given below:

Females (Pop. 1):Males (Pop. 2):n1=149, n2=136, x1=14, x2=13
Find a 94.3% Wilson estimate (plus four) confidence interval for the difference p1−p2 of the population proportions.

Confidence Interval =