Name:Statistics1. An investigative reporter contacts a random sample of hotels, and finds a 95% confidenceinterval for the proportion of hotels in the United States that have reported having bedbugs is(0.04, 0.11).a. Interpret this confidence interval in context.F380b. A national hospitality organization had reported that only 5% of hotels have experiencedproblems with bedbugs. Does this reporter have compelling evidence that the trueproportion is really higher? Explain.c. How could the reporter estimate this proportion with a smaller margin of error?a. Identify the parameter, p,2. To estimate how often someone runs a red light in Cyber City, a student watched traffic for awhile at several randomly selected intersections. Drivers ran the red light during 43 of 240light changes she observed.QOPeriod:Quiz (ch 16+17)F49F5Page 1 / 2cF68+F7Date::DIIF8DDF9

The objective of the question is to interpret the confidence interval, evaluate the evidence against…

Answered: Name: Statistics 1. An investigative…

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

26. You are trying to figure out if there is interest in a new restaurant opening in town. You speak to 150 random people, and discover that 60 of them would visit the new restaurant. Find a 95% confidence interval for the proportion of people that would visit the new restaurant.
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? 2 percent A 4 percent B 8 percent C 16 percent D 36 percent
1. You have recently had a debate with a friend about who uses smartphones the most. Your friend believes that men use smartphones more than women. After conducting a research study you find that out of 973 randomly sampled men, 379 use smartphones. Out of 1,304 randomly sampled women, 404 used smartphones. Based on a 95% confidence level, after hypothesis testing, what would you tell your friend? a. Which test will you use to test for this statistical analysis? b.State the null and alternative hypothesis: i.H0: ii.Ha c.What is the value of the test statistic?
An advertising agency wants to estimate the response rate for a new flyer. The agency sent the flyer to 100 randomly selected people and received 12 orders. a. What is the point estimate for the population proportion? b. What is the standard error of the proportion? c. Find 94% confidence interval for the percentage of those people who will place an order.
Mental health. The General Social Survey asked the question: “For how many days during the past30 days was your mental health, which includes stress, depression, and problems with emotions, not good?”Based on responses from 1,151 US residents, the survey reported a 95% confidence interval of 3.40 to 4.24days in 2010.(a) Interpret this interval in context of the data.(b) What does “95% confident” mean? Explain in the context of the application.(c) Suppose the researchers think a 99% confidence level would be more appropriate for this interval. Willthis new interval be smaller or wider than the 95% confidence interval?(d) If a new survey were to be done with 500 Americans, do you think the standard error of the estimatebe larger, smaller, or about the same.
9. A researcher wants to construct a 99% confidence interval for the proportion of Americans who think that the U.S. invading Iraq was an effective step in combating world terrorism. She has no initial idea of what that proportion is. How large should her sample size be if she wants the margin of error to be at most two percent? Show or explain your thinking.
4. on paper. random sample of 130 human body temperatures had a mean 98.25 degree and astandard deviation of 0.73 degree. Construct a 99% confidence interval for the average body temperature ofhealthy people.
2. According to the website Rotten Tomatoes, 94% of people who watched the Netflix show Stranger Things liked it. Since UR students tend to be scientifically minded, we hypothesize that less than 94% of UR students like the show. Out of 219 surveyed UR students, 198 indicated they like Stranger Things. Use the built in prop.test() function to: a. Construct a 90% confidence interval for the proportion of UR students who like Stranger Things. b. Test at the a=0.10 significance level whether the proportion of students who like Stranger Things is LESS THAN 0.94. What conclusion do you reach?
When constructing a 90% confidence interval around a sample mean, how many samples out of 100 would you expect to not include the true population mean within their confidence intervals? a. 5 b. 1 c. 0 d. 10
4.A prior study(by Pew Research 2021)found that 35 out of 50 randomly selected US adults between the ages of 18 to 29 use (or have used) Instagram. Construct a 99% confidence interval for the population proportion of US adults between the ages of 18 to 29 use (or have used) Instagram. (round to three decimal places) a.Identify the following: X, N, P b.Which distribution should you use for this problem? c.What is the corresponding critical value for a 99% confidence interval? d.Calculate the margin of error (3 decimal places) e.Construct a 99% confidence interval f. Interpret the interval.
what is the effect of selecting a higher confidence level (e.g., 99% vs. 68%) on:1. The associated Z score:A. Increases B. Decreases C. Stays the same 2. The observed sample average:A. Increases B. Decreases C. Stays the same 3. The range of values the population average might take:A. Increases B. Decreases C. Stays the same
A. Suppose we wish to make an estimate of the proportion of the population that has ever been arrested. We take a random sample of 500 people. In this sample, 10% of the respondents report having ever been arrested. Construct a 95% confidence interval for the proportion of people in the population who have been arrested. 2. Interpret, in words, the meaning of this interval.

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