QUESTION ONE The following is a Time Series for sales collected over a four year t for a company in the retail sector 3° quarter Quarter 2010 quarter 92 95 91 2019 90 98 2020 100 108 108 102 2021 end 128

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QUESTION ONE
for a company in the retail sector
The following is a Time Series for sales collected over a four year time period
TM
FORE
39
quarter
Quarter
2018
quarter
Quarter
94
02
2010
91
05
96
00
2020
100
98
110
108
2021
102
103
124
130
131
128
Required
(a) Determine the trend
(b) Compute seasonal variations using
i Additive model
il Multiplicative model
(c) Using the seasonal factors calculated above and the following trend
values for 2022 prepare the quarters 1, 2 3, and 4 of 2022 forecasts
using additive and multiplication model.
Transcribed Image Text:QUESTION ONE for a company in the retail sector The following is a Time Series for sales collected over a four year time period TM FORE 39 quarter Quarter 2018 quarter Quarter 94 02 2010 91 05 96 00 2020 100 98 110 108 2021 102 103 124 130 131 128 Required (a) Determine the trend (b) Compute seasonal variations using i Additive model il Multiplicative model (c) Using the seasonal factors calculated above and the following trend values for 2022 prepare the quarters 1, 2 3, and 4 of 2022 forecasts using additive and multiplication model.
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