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The forecasts on the basis of a time series are :

  • A.100% true
  • B.True to some extent
  • C.Never true
  • D.All of the above

Answer: B

Time series forecasts are true to some extent.

A time series forecast projects the trend, seasonal and cyclical components found in past data into the future. Its random or irregular component cannot be predicted, and the future may not follow past patterns, so forecasts are approximations with some error.

They are never guaranteed to be 100% true, yet they are useful and often fairly close, so 'never true' is also wrong. Since the first and third options contradict each other, 'All of the above' cannot be right.

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