Question

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

Sample 1	Sample 2
n1 = 400	n2 = 300
p1 = 0.53	p2 = 0.36

A. What is the point estimate of the difference between the two population proportions? (Use

p₁ − p₂.

)

B. Develop a 90% confidence interval for the difference between the two population proportions. (Use

p₁ − p₂.

Round your answer to four decimal places.)

to

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

p₁ − p₂.

Round your answer to four decimal places.)

Answer 1

The statistical software output for this problem is:

Hence,

a) Point estimate = 0.17

b) 90% confidence interval:

0.1087 to 0.2313

c) 95% confidence interval:

0.0969 to 0.3431