X Your answer is incorrect. Try again.The Labor Bureau wants to estimate, at a 90% confidence level, the proportion of all households that receive welfare. A preliminarysample showed that 13.5% of households in this sample receive welfare. The sample size that would limit the margin of error to bewithin 0.038 of the population proportion is:i244

Given : Margin of error: ME = 0.038 sample proportion: p̂ = 0.135…

Answered: The Labor Bureau wants to estimate, at…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

Given a 95% C.I. = (34.14 mm, 36.02 mm) for a sample of Wooly Bear caterpillar lengths (preceding problem), address the following. Based upon the above information, I am _____ % confident that the 95% C.I. contains the sample mean.
7.1.36-T 34.31%, 5.83 of 17 pts A programmer plans to develop a new software system. In planning for the operating system that he will use, he needs to estimate the percentage of computers that use a new operating system. How many computers must be surveyed in order to be 99% confident that his estimate is in error by no more than four percentage points? Complete parts (a) through (c) below. Question Help ▼ a) Assume that nothing is known about the percentage of computers with new operating systems. (Round up to the nearest integer.) Enter your answer in the answer box and then click Check Answer. 2 parts remaining Clear All Check Answer F9 F10 F8 吕0 F3 F6 F7 F4 F5 esc F2 F1 & %24 4 @ de 6. 7 8. 6. 5 E R T Y G H. K F #3
A population proportion is to be estimated. Estimate the minimum sample size needed to achieve a margin of error of 0.02 with a 95% degree of confidence. -- OA. 1,250 O B. 50 OC. 2,500 O D. 5,000
In this problem, assume that the distribution of differences is approximately normal. Note: For degrees of freedom d.f. not in the Student's t table, use the closest d.f. that is smaller. In some situations, this choice of d.f. may increase the P-value by a small amount and therefore produce a slightly more "conservative" answer.At five weather stations on Trail Ridge Road in Rocky Mountain National Park, the peak wind gusts (in miles per hour) for January and April are recorded below. Weather Station 1 2 3 4 5 January 139 120 126 64 78 April 108 113 102 88 61 Does this information indicate that the peak wind gusts are higher in January than in April? Use ? = 0.01. (Let d = January − April.) (a) What is the level of significance?=__ What is the value of the sample test statistic? (Round your answer to three decimal places.)=___
A national survey of 2500adult citizens of a nation found that 25%dreaded Valentine's Day. The margin of error for the survey was 4.6percentage points with 85% confidence. Explain what this means. Which statement below is the best explanation? A. There is 85% confidence that 25% of the adult citizens of the nation dreaded Valentine's Day. B. In 85% of samples of adult citizens of the nation, the proportion that dreaded Valentine's Day is between 0.204 and 0.296. C. There is 85% confidence that the proportion of the adult citizens of the nation that dreaded Valentine's Day is between 0.204 and 0.296. D. There is 80.4% to 89.6% confidence that 25% of the adult citizens of the nation dreaded Valentine's Day.
Consider these sample data: x1=15, x2=9, x3=3, x4=22. a. Find n. b. Compute ∑xi. c.Determine x. a.n=
In this problem, assume that the distribution of differences is approximately normal. Note: For degrees of freedom d.f. not in the Student's t table, use the closest d.f. that is smaller. In some situations, this choice of d.f. may increase the P-value by a small amount and therefore produce a slightly more "conservative" answer. At five weather stations on Trail Ridge Road in Rocky Mountain National Park, the peak wind gusts (in miles per hour) for January and April are recorded below. Weather Station January April USE SALT Does this information indicate that the peak wind gusts are higher in January than in April? Use α = 0.01. (Let d = January - April.) (a) What is the level of significance? 1 2 3 4 5 137 120 126 64 78 104 115 102 88 61 State the null and alternate hypotheses. Will you use a left-tailed, right-tailed, or two-tailed test? Ho: My = 0₁ H₁: 0; two-tailed O Hoi Hd O1 H₁: M O Hot Hd = 0; H₁: O Hot Hd = 0; H₁² = 0; right-tailed 0; right-tailed (b) What sampling…
A magazine provided results from a poll of 500 adults who were asked to identify their favorite pie. Among the 500 respondents, 12% chose chocolate pie, and the margin of error was given as ±4 percentage points. What values do p, q, n, E, and p represent? If the confidence level is 90%, what is the value of α? The value of p hat is : a. found from evaluating 1-p hat. b. the sample size c. the sample proportion d. the margin of error e. the population proportion The value of q hat is: a. found from evaluating 1-p hat. b. the sample size c. the sample proportion d. the margin of error e. the population proportion The value of n is: a. found from evaluating 1-p hat. b. the sample size c. the sample proportion d. the margin of error e. the population proportion The value of E is: a. found from evaluating 1-p hat. b. the sample size c. the sample proportion d. the margin of error e. the population proportion The value of p is: a. found from…
A national polling agency conducted a survey based on a random sample of Americans. The poll finds that 26% of Americans approve of the job that the President is doing; the poll has a margin of error of 8% (assuming a 95% degree of confidence). Step 3 of 3: What was the minimum size of the sample for this poll? Round your answer up to the nearest whole number.
For this problem, carry at least four digits after the decimal in your calculations. Answers may vary slightly due to rounding. Small Businesses is interested in the proportion of small businesses that declared Chapter 11 bankruptcy last year. Since there are so many small businesses, the National Council intends to estimate the proportion The National Council from a random sample. Let p be the proportion of small businesses that declared Chapter 11 bankruptcy last year. (a) If no preliminary sample is taken to estimate p, how large a sample is necessary to be 99% sure that a point estimate p will be within a distance of 0.09 from p? (Round your answer up to the nearest whole number.) small businesses (b) In a preliminary random sample of 30 small businesses, it was found that twelve had declared Chapter 11 bankruptcy. How many more small businesses should be included in the sample to be 99% sure that a point estimate p will be within a distance of 0.090 from p? (Round your answer up…
Determine the sample size associated with the following formula. Remember to always round up to the next highest whole number. ?=[(1.96)⋅(3.56)0.16]2n=[(1.96)⋅(3.56)0.16]2
In a recent survey of 157 WMU graduates, 117 students said that parking was too limited on campus. What is the estimate of the population proportion? What is the standard error of this estimate? Question 7 options: 1) Estimate of proportion: 0.745, Standard error: 0.0348. 2) Estimate of proportion: 0.255, Standard error: 0.0028. 3) Estimate of proportion: 0.745, Standard error: 0.0028. 4) The true population proportion is needed to calculate this. 5) Estimate of proportion: 0.255, Standard error: 0.0348.

SEE MORE QUESTIONS

Recommended textbooks for you

MATLAB: An Introduction with Applications

Statistics

ISBN:

9781119256830

Author:

Amos Gilat

Publisher:

John Wiley & Sons Inc

Probability and Statistics for Engineering and th…

Statistics

ISBN:

9781305251809

Author:

Jay L. Devore

Publisher:

Cengage Learning

Statistics for The Behavioral Sciences (MindTap C…

Statistics

ISBN:

9781305504912

Author:

Frederick J Gravetter, Larry B. Wallnau

Publisher:

Cengage Learning

MATLAB: An Introduction with Applications

Statistics

ISBN:

9781119256830

Author:

Amos Gilat

Publisher:

John Wiley & Sons Inc

Probability and Statistics for Engineering and th…

Statistics

ISBN:

9781305251809

Author:

Jay L. Devore

Publisher:

Cengage Learning

Statistics for The Behavioral Sciences (MindTap C…

Statistics

ISBN:

9781305504912

Author:

Frederick J Gravetter, Larry B. Wallnau

Publisher:

Cengage Learning

Elementary Statistics: Picturing the World (7th E…

Statistics

ISBN:

9780134683416

Author:

Ron Larson, Betsy Farber

Publisher:

PEARSON

The Basic Practice of Statistics

Statistics

ISBN:

9781319042578

Author:

David S. Moore, William I. Notz, Michael A. Fligner

Publisher:

W. H. Freeman

Introduction to the Practice of Statistics

Statistics

ISBN:

9781319013387

Author:

David S. Moore, George P. McCabe, Bruce A. Craig

Publisher:

W. H. Freeman

SEE MORE TEXTBOOKS