Lus Fertilizer Company distributes fertilizer to 1 and garden shops. The company must base its odnction schedule on a forecast of bow many lizer will be demanded from it. The company 1 the following data for the past three years s records. Demand for FertlUzer (ton) 105 Quarter 2 150 3 93 121 140 170 105
Lus Fertilizer Company distributes fertilizer to 1 and garden shops. The company must base its odnction schedule on a forecast of bow many lizer will be demanded from it. The company 1 the following data for the past three years s records. Demand for FertlUzer (ton) 105 Quarter 2 150 3 93 121 140 170 105
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
Need 12.13 problem
Transcribed Image Text:12-3. The LawnPlus Fertilizer Company distributes fertilizer to
various lawn and garden shops. The company must base its
quarterly prodoction schedule on a forecast of baw many
tons of fertilizer will be demanded from it. The company
bas gathered the following data for the past three years
from its sales records.
12-
Year
Quarter
Demand for FerlUzer (ton)
105
2
150
93
4.
121
2
140
170
105
150
150
10
170
11
110
12
130
a. Compute a three-quarter moving average forecast for
quarters 4 through 13 and compute the forecast error
for each quarter.
b. Compute a tive-quarter
ing average forecast for
quarters 6 through 13 and compute the forecast error
for each quarter.
c. Compute a weighted three-quarter moving average
forecast using weights of 0.50, 0.33, and 0.17 for the
most recent, next recent, and most distant data, respec-
tively, and compute the forecast error for each quarter.
d. Compare the forecasts developed in parts (a), (b), and
(c) using cumulative error. Which forecast appears to
be most accurate? Do any exhibit any bias?
Transcribed Image Text:Il óf the seasonally
12-13. Develop a seasonally adjusted forecast for the demand data
for fertilizer in Problem 12-3. Use a linear trend line model
to compute a forecast estimate for demand in year 4.
not'a Diggo delivery service has randomly selected
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