A survey of 400 students is selected randomly on a large university campus. They are asked if they use a laptop in class to take notes. Suppose that based on the survey, 240 of the 400 students responded "yes."a) What is the value of the sample proportion p?b) What is the standard error of the sample proportion?c) Construct an approximate 95% confidence interval for the true proportion p by taking +2 SEs from the sample proportion.a) p= (Type an integer or a decimal.)b) The standard error of the sample proportion is(Round to three decimal places as needed.)c) The approximate 95% confidence interval for the true proportion p by taking +2 SEs from the sample proportion is ( D.(Round to three decimal places as needed.)

Answered: Image /qna-images/answer/0309282c-e896-450c-93f1-455fd7b48ade.jpg

Answered: A survey of 400 students is selected…

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

a) Let p be the proportion of persons who like pineapple on their pizza. A random sample of n = 1530 people yielded 612 respondents who like pineapple on their pizza. Find an approximate 99% confidence interval for p. (Give your answers to 3 decimal places.)
In a recent survey of 90 randomly selected college students, 62 said that they believe in the existence of extraterrestrial life. a) Find p, the sample proportion that believes that there is extraterrestrial life. (Round your answers to three decimal places). p = b) The 90% margin of error associated with this estimate is: c) The 90 % confidence interval for the true proportion of all college students who believe there is extraterrestrial life is: to You may use the z table to answer this question. Submit Answer
Assume that a sample is used to estimate a population proportion p. Find the margin of error M.E. that corresponds to a sample of size 234 with 29.1% successes at a confidence level of 95%.
Use the given degree of confidence and sample data to construct a confidence interval for the population proportion p.When 316 third graders are randomly selected and surveyed, it is found that 112 own a cell phone. Find a 99% confidence interval for the true proportion of all third graders who own a cell phone.
Suppose a 90 percent confidence interval to estimate a population proportion was calculated from a sample proportion of 18 percent and a margin of error of 4 percent. What is the width of the confidence interval?
Among various ethnic groups, the population standard deviation of heights is unknown. We wish to construct a 95% confidence interval for the average height of men from a certain region. Forty-eight men from this region are surveyed. The sample mean is 71 inches and the sample standard deviation is 3 inches. A.) Construct a 95% confidence interval for the population mean height of men from this region. B.) Provide an interpretation for your interval.
For its “Music 360" survey, Nielsen Co. asked teenagers and adults how each group has listened to music in the past 12 months. Nearly two- thirds of U.S. teenagers under the age of 18 say they use Google Inc's video-sharing site to listen to music and 35% of the teenagers said they use Pandora Media Inc's custom online radio service (The Wall Street Journal, August 14, 2012). Suppose 10 teenagers are selected randomly to be interviewed about how they listen to music. Answer questions 7- 10.
A research center survey of 2,490 adults found that 1,902 had bought something online. Of these online shoppers, 1,237 are weekly online shoppers. a.) Construct a 95% confidence interval estimate of the population proportion of adults who had bought something online. b.) Construct a 95% confidence interval estimate of the population proportion of online shoppers who are weekly online shoppers.
An educator wants to construct a 99% confidence interval for the proportion of elementary school children in Michigan who are proficient in reading. Estimate the sample size needed to conduct this survey and assume that there there is no information available to be used from a previous study. Use a margin of error of 3%. What is the sample size: _________
Out of 85 adults selected randomly from one town, 63 have health insurance. Find a 90% confidence interval for the true proportion of all adults in the town who have health insurance. a) find sample proportion . b) use to find margin of Error for 90% confidence interval. c) Find the confidence interval. d) Interpret your interval show work. round all numbers to at least 3 decimal places. you don't need to explain in words where you get the numbers(unless it is easier for you than writing in math notations). you can only write in math notations.it should be clear which function you are using.(normalcdf, invnorm. invt,..)
You recently sent out a survey to determine if the percentage of adults who use social media has changed from 58%, which was the percentage of adults who used social media five years ago. Of the 2670 people who responded to survey, 1767 stated that they currently use social media. a) Use the data from this survey to construct a 93% confidence interval estimate of the proportion of adults who use social media. Record the result below in the form of (#, #). Round your final answer to four decimal places.
You are given the sample mean and the population standard deviation. i)Use this information to construct the 90% and 95% confidence intervals for the population mean. ii) interpret the results and compare the widths of the confidence intervals. A random sample of 40 home theater systems has a mean price of $145.00 assume the population standard deviation is $16.10 i) the 90% confidence interval is what? the 95% confidence interval is what? interpret the results

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