Consider the alternative estimator of o?, (n – 1)S²In. Find the mean squared error of this alternative estimator and compare it with that of s?.

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
ii. Consider the alternative estimator of o?, (n – 1)S²/n. Find the mean
squared error of this alternative estimator and compare it with that of
s?.
Transcribed Image Text:ii. Consider the alternative estimator of o?, (n – 1)S²/n. Find the mean squared error of this alternative estimator and compare it with that of s?.
c. Let X = {X1, X2, ..., Xn} be a random sample from a normal
distribution with the parameters u and o unknown. Consider the sample
mean and sample variance, respectively:
1
Xị and s?,
n -
(X; - X)².
n
i=1
i=1
It is known that in this case:
(n – 1)S²
o2
where x denotes a chi-squared distribution with n - 1 degrees of
freedom. It is also known that if X ~ x21, then:
|
n-1
E(X) = n – 1
and Var(X) = 2(n – 1).
|
Transcribed Image Text:c. Let X = {X1, X2, ..., Xn} be a random sample from a normal distribution with the parameters u and o unknown. Consider the sample mean and sample variance, respectively: 1 Xị and s?, n - (X; - X)². n i=1 i=1 It is known that in this case: (n – 1)S² o2 where x denotes a chi-squared distribution with n - 1 degrees of freedom. It is also known that if X ~ x21, then: | n-1 E(X) = n – 1 and Var(X) = 2(n – 1). |
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