a) Fit a seasonal regression model with trend to the data. Is the model significant at α = 0.05? What is the equation of the fit line. Interpret the model parameters in the context of the problem. b) Use the regression model of part a) to make quarterly sales forecasts and an annual sales forecast for the next year, i.e., 2024.

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Question
The worksheet Revenue in the Chp 17 HW problems data worksheet on Moodle
shows quarterly revenue over the period 2018-2023.
a) Fit a seasonal regression model with trend to the data. Is the model significant at
α = 0.05? What is the equation of the fit line. Interpret the model parameters in
the context of the problem.
b) Use the regression model of part a) to make quarterly sales forecasts and an annual
sales forecast for the next year, i.e., 2024.
Transcribed Image Text:The worksheet Revenue in the Chp 17 HW problems data worksheet on Moodle shows quarterly revenue over the period 2018-2023. a) Fit a seasonal regression model with trend to the data. Is the model significant at α = 0.05? What is the equation of the fit line. Interpret the model parameters in the context of the problem. b) Use the regression model of part a) to make quarterly sales forecasts and an annual sales forecast for the next year, i.e., 2024.
о
1 Year
2
A
B
0
D
E
F
G
H
J
K
M
N
Quarter
Revenue
t
Q1
Q2
Q3
2018 Qtr1
5330
1
1
0
0
3
Qtr2
6713
2
0
1
0
4
Qtr3
6906
3
0
0
1
5
Qtr4
7986
4
0
0
0
6
2019 Qtr1
5101
5
1
0
0
7
Qtr2
6178
6
0
1
0
8
Qtr3
6376
7
0
0
1
9
Qtr4
7457
0
0
0
10
2020 Qtr1
5530
9
1
0
0
11
Qtr2
6538
10
0
1
0
12
Qtr3
6830
11
0
0
1
13
Qtr4
8073
12
0
0
0
14
2021 Qtr1
6131
13
1
0
0
15
Qtr2
7070
14
0
1
0
16
Qtr3
7257
17
Qtr4
8803
18
2022 Qtr1
6585
19
Qtr2
7697
222222222222
Qtr3
8184
Qtr4
10096
2023 Qtr1
7205
Qtr2
8599
Qtr3
8950
Qtr4
10383
5676222222
15
0
0
1
16
0
0
0
17
1
0
0
18
0
1
0
19
0
0
20
0
0
21
23
24
1000
0
1
0
0
-000-0
1
28
29
30
<
Ready
47°F
Cloudy
Sales
Sterling
Revenue
+
Accessibility: Good to go
Q Search
P
Ο
Q
R
S
T
U
ENG
<
W
11:07 PM
4/6/2024
100%
PRE
Transcribed Image Text:о 1 Year 2 A B 0 D E F G H J K M N Quarter Revenue t Q1 Q2 Q3 2018 Qtr1 5330 1 1 0 0 3 Qtr2 6713 2 0 1 0 4 Qtr3 6906 3 0 0 1 5 Qtr4 7986 4 0 0 0 6 2019 Qtr1 5101 5 1 0 0 7 Qtr2 6178 6 0 1 0 8 Qtr3 6376 7 0 0 1 9 Qtr4 7457 0 0 0 10 2020 Qtr1 5530 9 1 0 0 11 Qtr2 6538 10 0 1 0 12 Qtr3 6830 11 0 0 1 13 Qtr4 8073 12 0 0 0 14 2021 Qtr1 6131 13 1 0 0 15 Qtr2 7070 14 0 1 0 16 Qtr3 7257 17 Qtr4 8803 18 2022 Qtr1 6585 19 Qtr2 7697 222222222222 Qtr3 8184 Qtr4 10096 2023 Qtr1 7205 Qtr2 8599 Qtr3 8950 Qtr4 10383 5676222222 15 0 0 1 16 0 0 0 17 1 0 0 18 0 1 0 19 0 0 20 0 0 21 23 24 1000 0 1 0 0 -000-0 1 28 29 30 < Ready 47°F Cloudy Sales Sterling Revenue + Accessibility: Good to go Q Search P Ο Q R S T U ENG < W 11:07 PM 4/6/2024 100% PRE
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