Question

Suppose a sample of 80 with a sample proportion of 0.58 is taken from a population. Which of the following is the approximate 68% confidence interval for the population parameter?

A.
(0.414, 0.746)
B.
(0.470, 0.690)
C.
(0.525, 0.635)
D.
(0.359, 0.801)

Answer 1

C.

(0.525, 0.635)

Explanation:

0.58 +/- 0.994sqrt(0.58×0.42/80)

0.58 +/- 0.05485042953

[0.5251495705 , 0.6348504295]