Small sample: Ninteen concrete blocks were sampled and tested for crushing strength in order to estimate the proportion that were sufficiently strong for acertain application. Seventeen of the 19 blocks were sufficiently strong. Use the small-sample method to construct an 80% confidence interval for the proportionof blocks that are sufficiently strong. Round the answers to at least three decimal places.An 80% confidence interval for the proportion of blocks that are sufficiently strong is

We have given that, Favorable cases (X) = 17, sample size (N) = 19 Then, We will find the 80%…

Answered: Small sample: Ninteen concrete blocks…

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

Use the given confidence interval to find the margin of error and the sample proportion. (0.774,0.800) E = (Type an integer or a decimal.)
Use the given confidence interval to find the margin of error and the sample proportion. (0.787,0.811) (Type an integer or a decimal.) p= (Type an integer or a decimal.) E=
Sample Size: Calculate the sample size. Karen from Big Chip cookie company discovered that on average her cookies have 12.9 chocolate chips with a standard deviation of 3.4 chocolate chips. If she wants to reduce the error for a 99% confidence interval to 1 chocolate chip, how many cookies should she sample?
A study of 420,073 cell phone users found that 136 of them developed cancer of the brain or nervous system. Prior to this study of cell phone use, the rate of such cancer was found to be 0.0326% for those not using cell phones. Complete parts (a) and (b). a. Use the sample data to construct a 90% confidence interval estimate of the percentage of cell phone users who develop cancer of the brain or nervous system. D%
Use the given confidence interval to find the margin of error and the sample proportion. (0.724,0.750) E = |(Type an integer or a decimal.) p = (Type an integer or a decimal.)
A poll conducted in 2013 found that 52% of U.S. adult Twitter users get at least some news on Twitter. The standard error for this estimate was 2.4%, and a normal distribution may be used to model the sample proportion. Construct a 99% confidence interval for the fraction of U.S. adult Twitter users who get some news on Twitter, and interpret the confidence interval in context. The point estimate p .52 The confidence coefficient z* = syntax incomplete. (Round to two decimal places.) The standard error SE = .024 We are 99% o confident that the true percent of U.S. adult Twitter users who get at least some news on Twitter is between % and %. (Enter the last two answers as percents, with the smaller percent first and rounded to the nearest tenth.)
Two brands of tires were compared for the proportion of defective tires. Random samples of tires were collected from each brand, and the number of defective tires from each brand was recorded. The data is in the following table. Number of defective tires (x) 41 32 n Continental Michelin 320 180 a.Construct a 97% confidence interval for the difference between the two proportions. b.For part a, find the desired sample sizes if you want the Continental sample to be 1.5 times Michelin sample with a sampling error equal to 0.03. c. Conduct a test of hypothesis to determine if the defective rates are the same. Use the P-value to interpret the results (a is not given).
The percent defective for parts produced by a manufacturing process is targeted at 4%. The process is monitored daily by taking samples of sizes n = 160 units. Suppose that today's sample contains 14 defectives. Determine a 88% confidence interval for the proportion defective for the process today
A survey was conducted to determine the proportion of adults who approve of attempts to clone a human. Based on the response of 1000 adults a 90% confidence interval was calculated to be (0.09, 0.13). A.What is the point estimate of the true proportion of adults who approve of attempts to clone a human? B.The margin of error for the confidence interval is:

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