Five hundred people are surveyed and 120 people say they love working out at a gym....
Five hundred people are surveyed and 120 people say they love working out at a gym. In order to have 99% confidence in your survey the margin of error should be what?
Homework Answers
Therefore, 99% confidence in ther survey the margin of error should be 0.0492
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Five hundred people are surveyed and 120 people say they love
working out at a gym....
1. The confidence interval of population propor- tion obtained from x = 120 and n =...
1. The confidence interval of population propor- tion obtained from x = 120 and n = 500 at the 99% level of confidence is a. 24% +5%. b. 5% + 24% c. 24% +2.5%. d. 24% + 1%. e. 99% +24%. 2. Five hundred people are surveyed and one- hundred-twenty say they hate statistics. In order to have 99% confidence in your survey the margin of error is a. +1% b. 25% c. +24% d. +99%. e. +120%
According to a Field Poll, 400 out of 506 surveyed California adults feel that “education and...
According to a Field Poll, 400 out of 506 surveyed California adults feel that “education and our schools” is one of the top issues facing California. We wish to construct a 90% confidence interval for the true proportion of California adults who feel that education and the schools are one of the top issues facing California. 1. A point estimate for the true population proportion is: _______________ (Write as a decimal and round to 4 decimal places) 2. The margin...
Please answer all parts of the question. 6. A survey is given to employees working the...
Please answer all parts of the question.
6. A survey is given to employees working the dayshift and nightshift jobs. They were asked if they were satisfied with their job. The results show sample sizes and the numbers being satisfied with their job. Construct the 98% confidence interval for the difference of proportions for dayshift and nightshift workers who are satisfied with their job. Dayshift n1 = 245 X1 = 162 Nightshift n2 = 276 X2 = 141 Answer the...
5. A Consumer Reports survey found that 124 people out of 427 surveyed prefer to purchase...
5. A Consumer Reports survey found that 124 people out of 427 surveyed prefer to purchase books online. Use the steps below to construct a 95% confidence interval to estimate the proportion of all people that prefer to purchase books online. a) What is the sample proportion of people that prefer to purchase books online? b) Find the critical value Za that corresponds to a 95% confidence level. c) Calculate "E" d) Construct your confidence interval. e) Write a sentence...
10. A physics student is trying to impress people by working out at the gym. a)...
10. A physics student is trying to impress people by working out at the gym. a) How much Gravitational Potential Energy would the student impart to a 35.0 kg weight in raising it from the floor tol.50 m high? 12 marks] b) How much mechanical work is done by the student on the weight? 12 marks] What is the power output of the student if raising the weight took 1.23 s? 12 marks] c) d) How much mechanical work is...
If I have a sample of 200 randomly selected people in a city of whom 120...
If I have a sample of 200 randomly selected people in a city of whom 120 are Christians, what would be a 95% confidence interval for the proportion of Christians in that city? If I want my confidence interval with a margin of error of 1% or less, how many people should I have in my sample? please show in excel in with formulas
13. (1 point) Wayne State College surveyed 900 students to learn if students would like to...
13. (1 point) Wayne State College surveyed 900 students to learn if students would like to switch to Coke products in school vending machines. The survey found 396 said the college should make the switch. What is the point estimate of the proportion of students at the college who would say the college should switch to Coke products? a. 396 b. 900 c. 0.44 d. 2.27 14. (1 point) Wayne State College surveyed 900 students to learn if students would...
2. A psychologist is interested in constructing a 99% confidence interval for the proportion of people...
2. A psychologist is interested in constructing a 99% confidence interval for the proportion of people who accept the theory that a person's spirit is no more than the complicated network of neurons in the brain. 64 of the 802 randomly selected people who were surveyed agreed with this theory. a. With 99% confidence the proportion of all people who accept the theory that a person's spirit is no more than the complicated network of neurons in the brain is...
On a certain day, Gallup reported that of the 1,008 people surveyed, 71% of U.S. workers...
On a certain day, Gallup reported that of the 1,008 people surveyed, 71% of U.S. workers believe that they will continue working past retirement age. The confidence level for this study was reported at 95% with a +3% margin of error. Part (a) Determine the estimated proportion from the sample. (Enter your answer to two decimal places.) 0.71 Part (b) Determine the sample size. (Enter your answer as a whole number.) 1008 @ Part (c) Identify CL and a. (Enter...
Out of 200 people sampled, 120 had kids. Based on this, construct a 99% confidence interval...
Out of 200 people sampled, 120 had kids. Based on this, construct a 99% confidence interval for the true population proportion of people with kids. Give your answers as decimals, to four places _____ < p < ______
1. The confidence interval of population propor- tion obtained from x = 120 and n = 500 at the 99% level of confidence is a. 24% +5%. b. 5% + 24% c. 24% +2.5%. d. 24% + 1%. e. 99% +24%. 2. Five hundred people are surveyed and one- hundred-twenty say they hate statistics. In order to have 99% confidence in your survey the margin of error is a. +1% b. 25% c. +24% d. +99%. e. +120%
Please answer all parts of the question.
6. A survey is given to employees working the dayshift and nightshift jobs. They were asked if they were satisfied with their job. The results show sample sizes and the numbers being satisfied with their job. Construct the 98% confidence interval for the difference of proportions for dayshift and nightshift workers who are satisfied with their job. Dayshift n1 = 245 X1 = 162 Nightshift n2 = 276 X2 = 141 Answer the...
5. A Consumer Reports survey found that 124 people out of 427 surveyed prefer to purchase books online. Use the steps below to construct a 95% confidence interval to estimate the proportion of all people that prefer to purchase books online. a) What is the sample proportion of people that prefer to purchase books online? b) Find the critical value Za that corresponds to a 95% confidence level. c) Calculate "E" d) Construct your confidence interval. e) Write a sentence...
10. A physics student is trying to impress people by working out at the gym. a) How much Gravitational Potential Energy would the student impart to a 35.0 kg weight in raising it from the floor tol.50 m high? 12 marks] b) How much mechanical work is done by the student on the weight? 12 marks] What is the power output of the student if raising the weight took 1.23 s? 12 marks] c) d) How much mechanical work is...
On a certain day, Gallup reported that of the 1,008 people surveyed, 71% of U.S. workers believe that they will continue working past retirement age. The confidence level for this study was reported at 95% with a +3% margin of error. Part (a) Determine the estimated proportion from the sample. (Enter your answer to two decimal places.) 0.71 Part (b) Determine the sample size. (Enter your answer as a whole number.) 1008 @ Part (c) Identify CL and a. (Enter...
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