Question

In a poll to estimate presidential popularity, each person in a random sample of 1,310 voters...

In a poll to estimate presidential popularity, each person in a random sample of 1,310 voters was asked to agree with one of the following statements:

  1. The president is doing a good job.

  2. The president is doing a poor job.

  3. I have no opinion.


A total of 625 respondents selected the first statement, indicating they thought the president was doing a good job.

  1. Construct a 95% confidence interval for the proportion of respondents who feel the president is doing a good job. (Round your answers to 3 decimal places.)

Homework Answers

Answer #1

Solution :

Given that,

Point estimate = sample proportion = = x / n = 625 / 1310 = 0.477

1 - = 1 - 0.477 = 0.523

Z/2 = 1.96

Margin of error = E = Z / 2 * (( * (1 - )) / n)

= 1.96 * (((0.477 * 0.523) /1310 )

= 0.027

A 95% confidence interval for population proportion p is ,

- E < p < + E

0.477 - 0.027 < p < 0.477 + 0.027

0.450 < p < 0.504

The 95% confidence interval for the population proportion p is : 0.450 . 0.504

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
In a poll to estimate presidential popularity, each person in a random sample of 1,230 voters...
In a poll to estimate presidential popularity, each person in a random sample of 1,230 voters was asked to agree with one of the following statements: The president is doing a good job. The president is doing a poor job. I have no opinion. A total of 675 respondents selected the first statement, indicating they thought the president was doing a good job. Construct a 99% confidence interval for the proportion of respondents who feel the president is doing a...
In a poll to estimate presidential popularity, each person in a random sample of 950 voters...
In a poll to estimate presidential popularity, each person in a random sample of 950 voters was asked to agree with one of the following statements: The president is doing a good job. The president is doing a poor job. I have no opinion. A total of 500 respondents selected the first statement, indicating they thought the president was doing a good job. Construct a 90% confidence interval for the proportion of respondents who feel the president is doing a...
In a poll to estimate presidential popularity, each person in a random sample of 1,500 voters...
In a poll to estimate presidential popularity, each person in a random sample of 1,500 voters was asked to agree with one of the following statements: 1. The president is doing a good job. 2. The president is doing a poor job. 3. I have no opinion. A total of 690 respondents selected the first statement, indicating they thought the president was doing a good job. (a) Construct a 98% confidence interval for the proportion of respondents who feel the...
In a poll to estimate presidential popularity, each person in a random sample of 990 voters...
In a poll to estimate presidential popularity, each person in a random sample of 990 voters was asked to agree with one of the following statements: 1. The president is doing a good job. 2. The president is doing a poor job. 3. I have no opinion. A total of 700 respondents selected the first statement, indicating they thought the president was doing a good job. a. Construct a 95% confidence interval for the proportion of respondents who feel the...
In a poll to estimate a senator's support, each person in a random sample of 1,500...
In a poll to estimate a senator's support, each person in a random sample of 1,500 constituents was asked to agree with one of the following statements: a. The senator is doing an excellent job. b. The senator is doing a poorly. c. No opinion. A total of 650 respondents selected the first statement, indicating they thought the senator was doing an excellent job. (1.) Construct a 99% confidence interval for the proportion of respondents who feel the president is...
A poll of 3,200 voters were asked what they thought the most significant issue was in...
A poll of 3,200 voters were asked what they thought the most significant issue was in the upcoming election. Sixty-eight percent answered the economy. a) Construct a 90% confidence interval for the population proportion of voters who feel the economy is the most important issue. Write a complete sentence describing the meaning of this confidence interval. b) Construct a 95% confidence interval for the population proportion of voters who feel the economy is the most important issue. Write a complete...
A poll of 3,200 voters were asked what they thought the most significant issue was in...
A poll of 3,200 voters were asked what they thought the most significant issue was in the upcoming election. Sixty-eight percent answered the economy. a) Construct a 90% confidence interval for the population proportion of voters who feel the economy is the most important issue. Write a complete sentence describing the meaning of this confidence interval. b) Construct a 95% confidence interval for the population proportion of voters who feel the economy is the most important issue. Write a complete...
Each person in a random sample of 5000 "likely voters" was questioned about his or her...
Each person in a random sample of 5000 "likely voters" was questioned about his or her political views. Of those surveyed, 3402 felt that "the economy's state" was the most urgent national concern. A. Using the plus four estimate, p, we estimate the proportion of likely voters that felt the economy's state was the most urgent national concern to be: B. The standard error SE of p, the estimated proportion viewing the economy's state as most urgent, is: C. A...
QUESTION 1 1. Brianna is trying to increase her chances of being promoted to vice president...
QUESTION 1 1. Brianna is trying to increase her chances of being promoted to vice president by working to build good work relationships with other managers outside her own department. Brianna's behavior should be viewed as dysfunctional politics. functional politics. coercive power. functional influence. 2 points QUESTION 2 1. The Gingerbread Factory has a separate unit that makes their chocolate crunch cookies and another unit that is completely responsible for all operations in producing their ginger snap cookies. The Gingerbread...
Using the model proposed by Lafley and Charan, analyze how Apigee was able to drive innovation....
Using the model proposed by Lafley and Charan, analyze how Apigee was able to drive innovation. case:    W17400 APIGEE: PEOPLE MANAGEMENT PRACTICES AND THE CHALLENGE OF GROWTH Ranjeet Nambudiri, S. Ramnarayan, and Catherine Xavier wrote this case solely to provide material for class discussion. The authors do not intend to illustrate either effective or ineffective handling of a managerial situation. The authors may have disguised certain names and other identifying information to protect confidentiality. This publication may not be...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT