Homework Help is Here – Start Your Trial Now!
Math
Statistics
To construct a confidence interval for the difference between two population means ₁-₂, use the formula shown below when both population standard deviations are known, and either both populations are normally distributed or both n₁ 230 and n₂ 2 30. Also, the samples must be randomly selected and independent. 0₁ 0₂ (x₁-x2)-20₁7

To construct a confidence interval for the difference between two population means ₁-₂, use the formula shown below when both population standard deviations are known, and either both populations are normally distributed or both n₁ 230 and n₂ 2 30. Also, the samples must be randomly selected and independent. 0₁ 0₂ (x₁-x2)-20₁7

MATLAB: An Introduction with Applications
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
icon
Related questions
Question

14

To construct a confidence interval for the difference between two population means ₁-₂, use the formula shown below when both population standard deviations are known, and either both populations are normally distributed or both n₁ ≥ 30 and n₂ ≥ 30. Also, the samples must be randomly selected and independent. 0² 0² (x₁-x₂)-20 <H₁-H₂ < (x₁-x₂) +Zc n₁ n₂ n₁ n₂ The descriptive statistics for the annual salaries from a random sample of microbiologists from two regions are shown below. Construct a 95% confidence interval for the difference between the mean annual salaries. x₁ = $106,720, n₁ = 40, and ₁ = $8560; x₂ = $85,560, n₂ = 35, and σ₂ = $8555 Complete the 95% confidence interval for μ₁ −μ₂ below. $<H1-H₂ <$ (Round to the nearest dollar as needed.)
Transcribed Image Text:To construct a confidence interval for the difference between two population means ₁-₂, use the formula shown below when both population standard deviations are known, and either both populations are normally distributed or both n₁ ≥ 30 and n₂ ≥ 30. Also, the samples must be randomly selected and independent. 0² 0² (x₁-x₂)-20 <H₁-H₂ < (x₁-x₂) +Zc n₁ n₂ n₁ n₂ The descriptive statistics for the annual salaries from a random sample of microbiologists from two regions are shown below. Construct a 95% confidence interval for the difference between the mean annual salaries. x₁ = $106,720, n₁ = 40, and ₁ = $8560; x₂ = $85,560, n₂ = 35, and σ₂ = $8555 Complete the 95% confidence interval for μ₁ −μ₂ below. $<H1-H₂ <$ (Round to the nearest dollar as needed.)
Expert Solution
steps

Step by step

Solved in 2 steps with 2 images

SEE SOLUTIONCheck out a sample Q&A here
Blurred answer
Recommended textbooks for you
MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
Statistics
ISBN:
9781119256830
Author:
Amos Gilat
Publisher:
John Wiley & Sons Inc
Probability and Statistics for Engineering and th…
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 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…
Elementary Statistics: Picturing the World (7th E…
Statistics
ISBN:
9780134683416
Author:
Ron Larson, Betsy Farber
Publisher:
PEARSON
The Basic Practice of Statistics
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
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