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CONFIDENCE INTERVAL OF POPULATION PROPORTION

A. Directions:Solve the following problem.

1. Find the proportionsandfor each of the following: a. X=135,n=378

b. X=234,n=512

1. A survey of 1000 students shows that 780 trust the College Dean. Compute a 95% confidence interval for the proportion of all students who trust the College Dean.
2. what is the pointestimate?
3. what is the confidenceinterval?

1. The New York Timesand CBS News conducted a nationwide poll of 1048 randomly selected 13- to 17-year-olds. We can consider the sample to be a SRS. Of the 1048 teens surveyed, 189 named Fox as their favorite television network. Give a 90% confidence interval for the proportion of all people in this age group who would choose Fox as their favoritenetwork.
2. Find the pointestimate.
3. Find the confidenceinterval.