1. Two samples drawn from normal distributions with the following sample sizes: ni = 15 and na= 1 sample means X= 6.2 and x= 7.8, and sample varjances s=4 and s = 6.25. Assuming they ha equal variances. Their pooled estimator of variance (S,) is: a) 49.64 b) 5.125 c) 6.5 d) 46.1 e) 7.045

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
7. Two samples drawn from normal distributions with the following sample sizes: ni = 15 and n:= 15.
Sample means X=62 and x= 7.8, and sample variances s, =4 and s = 6.25. Assuming they have
equal variances. Their pooled estimator of variance (S,) is:
a) 49.64
b) 5.125
c) 6.5
d) 46.1
e) 7.045
Transcribed Image Text:7. Two samples drawn from normal distributions with the following sample sizes: ni = 15 and n:= 15. Sample means X=62 and x= 7.8, and sample variances s, =4 and s = 6.25. Assuming they have equal variances. Their pooled estimator of variance (S,) is: a) 49.64 b) 5.125 c) 6.5 d) 46.1 e) 7.045
Expert Solution
steps

Step by step

Solved in 2 steps with 2 images

Blurred answer
Similar 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