Which of the following is NOT a method of measuring the trend of a time series?
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → Method of random sampling
The trend of a time series can be measured by four methods: the graphical method, the semi averages method, the moving averages method and the method of least squares.
Random sampling is a way of choosing a sample from a population; it does not measure the trend of a time series.