Question

A two proportion z interval was constructed for the difference in the two population proportions, p1- p2. The resulting 99% confidence interval was (–0.004, 0.12). A conclusion that could be drawn is:

A: There is no significant difference between p1 and p2.

B: There is a significant difference between p1 and p2.

C: The range of possible differences between the two proportions could be from a 0.4% difference with p2 being larger up to a 12% difference with p1 being larger.

D: Both (a) and (c) are correct.

E: Both (b) and (c) are correct.

Answer 1

A two proportion z interval was constructed for the difference in the two population proportions, p1- p2. The resulting 99% confidence interval was (–0.004, 0.12).

If confidence interval contain 0. then we can say that there is no significant difference between two proportions.

Here confidence interval contains 0,

so we can conclude that there is no significant difference between p1 and p2.

A conclusion that could be drawn is:

ANSWER:-

A: There is no significant difference between p1 and p2.