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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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