t 1 JULE SITE 2 3 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 Sales 7 13 10 4 10 20 16 8 15 26 24 12 18 30 23 20 24 36 30 21 24 36 29 22 30 41 36 25 Centered Moving Average 13

Functions and Change: A Modeling Approach to College Algebra (MindTap Course List)
6th Edition
ISBN:9781337111348
Author:Bruce Crauder, Benny Evans, Alan Noell
Publisher:Bruce Crauder, Benny Evans, Alan Noell
Chapter5: A Survey Of Other Common Functions
Section5.3: Modeling Data With Power Functions
Problem 6E: Urban Travel Times Population of cities and driving times are related, as shown in the accompanying...
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b. Compute the seasonal indexes for the four quarters (to 3 decimals).

Hudson Marine provides boats sales, service, and maintenance. Boat trailers are one of its top sales items. Suppose the quarterly sales values for
the seven years of historical data are as follows. Do not round intermediate calculations.
Year
1
2
3
4
5
6
7
Quarter 1 Quarter 2
7
13
10
15
18
24
24
30
20
26
30
36
36
41
Quarter 3
10
16
24
23
30
29
36
Quarter 4
4
8
12
20
21
22
25
Total Yearly
Sales
34
54
77
91
111
111
132
Transcribed Image Text:Hudson Marine provides boats sales, service, and maintenance. Boat trailers are one of its top sales items. Suppose the quarterly sales values for the seven years of historical data are as follows. Do not round intermediate calculations. Year 1 2 3 4 5 6 7 Quarter 1 Quarter 2 7 13 10 15 18 24 24 30 20 26 30 36 36 41 Quarter 3 10 16 24 23 30 29 36 Quarter 4 4 8 12 20 21 22 25 Total Yearly Sales 34 54 77 91 111 111 132
a. Compute the centered moving average values (first find Four-Quarter Moving Average) for this time series (to 3 decimals).
Centered Moving
Average
t
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
Sales
7
13
10
4
10
20
16
8
15
26
24
12
18
30
23
20
24
36
30
21
24
36
29
22
30
41
36
25
13
***
Transcribed Image Text:a. Compute the centered moving average values (first find Four-Quarter Moving Average) for this time series (to 3 decimals). Centered Moving Average t 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 Sales 7 13 10 4 10 20 16 8 15 26 24 12 18 30 23 20 24 36 30 21 24 36 29 22 30 41 36 25 13 ***
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