Answered: Quarter Stock (%) Year 1, qtr 1 Year 1,…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Question

The following table reports the percentage of stocks in a portfolio for nine quarters:

a. Construct a time series plot. What type of pattern exists in the data?
b. Use trial and error to find a value of the exponential smoothing coefficient a that
results in a relatively small MSE.
c. Using the exponential smoothing model you developed in part b, what is the forecast
of the percentage of stocks in a typical portfolio for the second quarter of year 3?

Quarter
Stock (%)
Year 1, qtr 1
Year 1, qtr 2
Year 1, qtr 3
Year 1, qtr 4
Year 2, qtr 1
29.8
31.0
29.9
30.1
32.2
Year 2, qtr 2
Year 2, qtr 3
Year 2, qtr 4
Year 3, qtr 1
31.5
32.0
31.9
30.0

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