Two random samples are selected from two independent populations. A summary of the samples sizes and sample means is given below:   ?1=45,?2=50,?¯1=57.4?¯2=73n1=45,x¯1=57.4n2=50,x¯2=73   If the 92.5% confidence interval for the difference ?1−?2μ1−μ2 of the means is (-18.6761, -12.5239), what is the value of the pooled variance estimator? (You may assume equal population variances.) Pooled Variance Estimator =

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
icon
Related questions
Question

Two random samples are selected from two independent populations. A summary of the samples sizes and sample means is given below:

 

?1=45,?2=50,?¯1=57.4?¯2=73n1=45,x¯1=57.4n2=50,x¯2=73

 

If the 92.5% confidence interval for the difference ?1−?2μ1−μ2 of the means is (-18.6761, -12.5239), what is the value of the pooled variance estimator? (You may assume equal population variances.)

Pooled Variance Estimator = 

Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 3 steps

Blurred answer
Similar questions
  • SEE MORE QUESTIONS
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