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Sum
Solve the following problem :
Obtain trend values for data in Problem IV (1) using 5-yearly moving averages.
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Solution
Construct the following table for obtaining 5-yearly moving average for the data in problem 1:
| Year t |
Production | 5-yearly moving total | 5-yearly moving averages trend value |
| 1974 | 0 | – | – |
| 1975 | 4 | – | – |
| 1976 | 9 | 30 | 6 |
| 1977 | 9 | 35 | 7 |
| 1978 | 8 | 35 | 7 |
| 1979 | 5 | 34 | 6.8 |
| 1980 | 4 | 35 | 7 |
| 1981 | 8 | – | – |
| 1982 | 10 | – | – |
Concept: Measurement of Secular Trend
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