The quarterly earnings of a large soft drink company have been recorded for the period 2014 - 2017. These data (in millions of rupees) are shown in the accompanying table. Year Quarter Sales Centered moving average 2014 1 52 2 67 3 85 62.03 4 54 63.38 2015 1 57 66.63 2 75 65.16 3 90 67.99 4 61 70.94 2016 1 60 70.55 2 77 73.61 3 94 71.57 4 63 72.84 2017 1 66 73.68 2 82 76.02 3 98 4 67
The quarterly earnings of a large soft drink company have been recorded for the period 2014 - 2017. These data (in millions of rupees) are shown in the accompanying table. Year Quarter Sales Centered moving average 2014 1 52 2 67 3 85 62.03 4 54 63.38 2015 1 57 66.63 2 75 65.16 3 90 67.99 4 61 70.94 2016 1 60 70.55 2 77 73.61 3 94 71.57 4 63 72.84 2017 1 66 73.68 2 82 76.02 3 98 4 67
MATLAB: An Introduction with Applications
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Chapter1: Starting With Matlab
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The quarterly earnings of a large soft drink company have been recorded for the period 2014 - 2017. These data (in millions of rupees) are shown in the accompanying table.
Year |
Quarter |
Sales |
Centered moving average |
2014 |
1 |
52 |
|
|
2 |
67 |
|
|
3 |
85 |
62.03 |
|
4 |
54 |
63.38 |
2015 |
1 |
57 |
66.63 |
|
2 |
75 |
65.16 |
|
3 |
90 |
67.99 |
|
4 |
61 |
70.94 |
2016 |
1 |
60 |
70.55 |
|
2 |
77 |
73.61 |
|
3 |
94 |
71.57 |
|
4 |
63 |
72.84 |
2017 |
1 |
66 |
73.68 |
|
2 |
82 |
76.02 |
|
3 |
98 |
|
|
4 |
67 |
- Find the seasonal index values using the moving averages.
- The trend line with de-seasonalised series was found as:
Y = 62.09 + 1.14t where t is the quarter number ( t=1 for the first quarter 2014). Find the forecasted sales for the four quarters of year 2017.
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