Carmela randomly selected 65 stamps from a stamp collection. Eleven of these were commemorative stamps.

What is the interval estimate for the proportion of commemorative stamps in the entire collection if the sampling method had a margin of error of ±0.025 ?

(0.145, 0.195)

(0.415, 0.465)

(0.085, 0.135)

(0.035, 0.085)

Question

Carmela randomly selected 65 stamps from a stamp collection. Eleven of these were commemorative stamps.

What is the interval estimate for the proportion of commemorative stamps in the entire collection if the sampling method had a margin of error of  ±0.025 ?

(0.145, 0.195)

(0.415, 0.465)

(0.085, 0.135)

(0.035, 0.085)

jimthompson5910 · Answer

how far did you get with this?

If you're not sure how to start, here's a hint:
phat = x/n = 11/65 = 0.16923
that represents the sample proportion