Question

In a USA Today/Gallup poll conducted November 2-4, 2007, 768 of 1024 randomly selected adult Americans aged 18 or older stated that a candidates’ position on the issue of family values is extremely or very important in determining their votes for president.

a) What is a point estimate for the proportion of adult Americans aged 18 or older for which the issue of family values is extremely or very important in determining their votes for the president?

b) Construct a 98% confidence interval for the proportion of adult Americans aged 18 or older for which the issue of family values is extremely or very important in determining their votes for the president.

c) Is it possible that the proportion of adult Americans aged 18 or older for which the issue of family values is extremely or very important in determining their votes for president is below 65%? Is this likely?

Answer 1

768 %3D 0.15 point imale. 1024 s popatiom, for 98./ CL 2.326 Z valve b CI 2.326 p (1-f) %3D 2.326 o7s Co25) O.15 on5 + 2.526 2.326 0.15 xo-25 lozu 1024 (o.119, 0:181) below 63-. mulily that value i ose O Y if is very sulikely very 019 to ooT81 tue we are 98 - the value lies behven the