Question

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

Sample 1	Sample 2
n1 = 400	n2 = 300
p1 = 0.53	p2 = 0.31

(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.)

  to  

Answer 1