An engineer wants to determine the average time that it takes to drill a hole in a certain metaltype. How large a sample will he need to be 98% confident that his sample mean will be within 8seconds of the true population mean? ( the population standard deviation of this drill is 25seconds.

Given data isstandard deviation(σ)=25Margin of error(E)=0.08Confidence interval =98%

Answered: An engineer wants to determine the…

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

You want to obtain a sample to estimate a population mean. Based on previous evidence, you believe the population standard deviation is approximately σ=57.2σ=57.2. You would like to be 90% confident that your estimate is within 1 of the true population mean. How large of a sample size is required?
You want to obtain a sample to estimate a population mean. Based on previous evidence, you believe the population standard deviation is approximately σ=23.2σ=23.2. You would like to be 99% confident that your estimate is within 4 of the true population mean. How large of a sample size is required?
You want to obtain a sample to estimate a population mean. Based on previous evidence, you believe the population standard deviation is approximately σ=71.7σ=71.7. You would like to be 98% confident that your estimate is within 1 of the true population mean. How large of a sample size is required?
You want to obtain a sample to estimate a population mean. Based on previous evidence, you believe the population standard deviation is approximately σ = 43.4 . You would like to be 99% confident that your estimate is within 3 of the true population mean. How large of a sample size is required?
You want to obtain a sample to estimate a population mean. Based on previous evidence, you believe the population standard deviation is approximately σ=58.3σ=58.3. You would like to be 95% confident that your estimate is within 2 of the true population mean. How large of a sample size is required? Round up to nearest whole number.
Consider two populations in the same state. Both populations are the same size (22,000). Population 1 consists of all students at the State university. Population 2 consists of all residents in a small town. Consider the variable Age. Which population would most likely have the largest standard deviation? They would likely have the same standard deviation(SD) for age because they have the same population size. O Population 2 would more likely have a higher standard deviation (SD) than Population 1. Population 1 would more likely have a higher standard deviation(SD) than Population 2 There is not enough information to tell.
I don't know how to solve it.
You take random sample of 200 people from Salinas and find that their average income is $48, 000 per ssalazar@stuce X year with a standard deviation of $9000. Also assume that population incomes are normally Email om sampile of 200 distributed. om sangle cf 200 X Approximately how many people make between $39,000 and $57,000? Uplead on sanple cf 200 X 200 O Cirf-I Answer format: Enter a positive integer Text
You want to obtain a sample to estimate a population mean. Based on previous evidence, you believe the population standard deviation is approximately σ=57.4σ=57.4. You would like to be 99% confident that your estimate is within 1.5 of the true population mean. How large of a sample size is required?
You want to obtain a sample to estimate a population mean. Based on previous evidence, you believe the population standard deviation is approximately σ=55.5σ=55.5. You would like to be 99% confident that your estimate is within 5 of the true population mean. How large of a sample size is required?
You want to obtain a sample to estimate a population mean. Based on previous evidence, you believe the population standard deviation is approximately σ=44.7. You would like to be 90% confident that your estimate is within 0.2 of the true population mean. How large of a sample size is required?n =
A nurse at a local hospital is interested in estimating the birth weight of infants. How large a sample must she select if she desires to be 95% confident that the true mean is within 3 ounces of the sample mean? The standard deviation of the birth weights is known to be 6 ounces. 4 O 3 O 16 15

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

An engineer wants to determine the average time that it takes to drill a hole in a certain metal type. How large a sample will he need to be 98% confident that his sample mean will be within 8 seconds of the true population mean? ( the population standard deviation of this drill is 25 seconds.