Question

According to a recent survey of 1100 people, 62% feel that the president is doing an acceptable job. We are interested in the population proportion of people who feel the president is doing an acceptable job.

NOTE: If you are using a Student's t-distribution, you may assume that the underlying population is normally distributed. (In general, you must first prove that assumption, though.)

1. Which distribution should you use for this problem? (Round your answers to four decimal places.)

P' ~. ( , )

2. Construct a 90% confidence interval for the population proportion of people who feel the president is doing an acceptable job.

(i) State the confidence interval. (Round your answers to four decimal places.)

( , )

(iii) Calculate the error bound. (Round your answer to four decimal places.)

Answer 1