A television sports commentator wants to estimate the proportion of Americans who follow professional football. What sample size

Question

2 years ago

9

A television sports commentator wants to estimate the proportion of Americans who follow professional football. What sample size

should be obtained if he wants to be within 3 percentage points with 95% confidence if
(a) he uses a 2010 estimate of 53% obtained from a Harris poll?
(b) he does not use any prior estimates?
(c) Why are the results from parts (a) and (b) so close?

Mathematics

1 answer:

Lesechka [4] · Answer 1 · 2022-09-07T20:27:28+03:00

Lesechka [4]2 years ago

8 0

Answer:

A.1,063

B.1.067

C.Since 0.2491 is close 0.25 this means that the results from parts (a) and (b) are close.

Step-by-step explanation:

A. If he uses a 2010 estimate of 53% obtained from a Harris poll

Since E is 0.03

The next stel is to find Z using this formula