Question

Consider the following results for independent samples taken from two populations.

sample 1

n=400

p=0.48

sample 2

n=300

p=0.36

Develop a 95% confidence interval for the difference between the two population proportions.

Select one:

a. (0.13 to 0.29)

b. (0.05 to 0.19)

c. (0.09 to 0.21)

d. (0.06 to 0.18)

Answer 1

Sample sizes are large so we will use critical value using normal table for calculating confidence interval.