In this question you will consider properties of sample estimators in time series context and perform inference and testing. You may use R to assist you in calculations, but you should state the formula of any estimator you are calculating as well as the value you obtain for the estimator, and if R is used, the R command utilised. You can either obtain the solution by calculator or by R. 15 samples from a time series: (a) You are given T {y₁, ..., y15} = {-0.92, 1.08, 0.20, -0.63, 1.36, 1.33, -1.06, = 0.11, -1.00, -0.68, 1.81, 1.71, 0.93,-0.75, -2.16} = =- Calculate the Sample mean, the Sample ACVF (for lags k 0,1,2,3,4) and the Sample ACF (for lags k : 0,1,2,3,4) and plot the correlogram. Comment on whether this time series data is pure white noise or not based on the Correlogram you construct. Remark on the effect of such a small sample size on this conclusion.

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
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In this question you will consider properties of sample estimators
in time series context and perform inference and testing. You
may use R to assist you in calculations, but you should state the
formula of any estimator you are calculating as well as the value
you obtain for the estimator, and if R is used, the R command
utilised. You can either obtain the solution by calculator or R.
(a) You are given T = 15 samples from a time series:
{y₁,..., y15}
= {-0.92, 1.08, 0.20, −0.63, 1.36, 1.33, -1.06,
0.11, -1.00, -0.68, 1.81, 1.71, 0.93,-0.75, -2.16}
-
=
Calculate the Sample mean, the Sample ACVF (for lags k
0,1,2,3,4) and the Sample ACF (for lags k 0,1,2,3,4) and
plot the correlogram. Comment on whether this time series
data is pure white noise or not based on the Correlogram you
construct. Remark on the effect of such a small sample size
on this conclusion.
Transcribed Image Text:In this question you will consider properties of sample estimators in time series context and perform inference and testing. You may use R to assist you in calculations, but you should state the formula of any estimator you are calculating as well as the value you obtain for the estimator, and if R is used, the R command utilised. You can either obtain the solution by calculator or R. (a) You are given T = 15 samples from a time series: {y₁,..., y15} = {-0.92, 1.08, 0.20, −0.63, 1.36, 1.33, -1.06, 0.11, -1.00, -0.68, 1.81, 1.71, 0.93,-0.75, -2.16} - = Calculate the Sample mean, the Sample ACVF (for lags k 0,1,2,3,4) and the Sample ACF (for lags k 0,1,2,3,4) and plot the correlogram. Comment on whether this time series data is pure white noise or not based on the Correlogram you construct. Remark on the effect of such a small sample size on this conclusion.
Expert Solution
Step 1

Given T=15 samples from a time series 

y1, . . ., y15=-0.92, 1.08, 0.20, -0.63, 1.36, 1.33, -1.06, 0.11, -1.00, -0.68, 1.81, 1.71, 0.93, -0.75, -2.16

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