Chapter 8, Problem 124H

Refer to Exercise 8.123. Another question in the poll was (How much are] you worried about the quality of education in our schools?’ Sixty-three percent responded a lot. We are Interested In the population proportion of adult Ameitcans who are worried a lot about the quality of education in our schools.

a. Define the random variables X and P In words.

b. Which disutribution should you use f or this problem? Explain your choice.

c. Construct a 95% confidence interval for the population propc*tIon of adult Americans who are wonted a lot about the quahtv of education in our schools.

1. State the confidence interval.

11. Sketch the giaph.

ill. Calculate the error bound.

d. The sampling error given by Yankelovich Partners, Inc. (which conducted the poll) Is 3%. In one to three complete sentences, explain what the 3% represents.