9:26 PM webwork.pcc.edu ..11 Verizon * 36% . Courses sonewokProportion and Confi

Question

9:26 PM webwork.pcc.edu ..11 Verizon * 36% . Courses sonewokProportion and Confidence Intervals: Proporion Problem 6 Sets and Previous Problem Problem List Next Problem (1 point) A poll is taken in which 302 out of 550 randomly selected voters indicated their preference for a certain candidate. Find a 99% confidence interval for User Settings Grades Achievements 561 Note: You can earn partial credit on this problem. Preview My Answers Submit Answers You have attempted this problem 2 times. Your overall recorded score is 096. You have unlimited attempts remaining. Problem 1 Problem 2 Show Past Answers Problem 3 Problem 4 Email instructor Problem 5 Problem 6 Problem 7 Problem 8 Problem 9 Problem 10 V 12 14

Explanation / Answer

Ans:

Given that

sample size,n=550

sample proportion=302/550=0.549

z value for 99% confidence interval is 2.58

99% confidence interval for p

=0.549+/-2.58*sqrt(0.549*(1-0.549)/550)

=0.549+/-0.055

=(0.494, 0.604)

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