Method of Semi Averages (2020)

The secular trends can also be measured by the method of semi averages. The steps are: Let $y’_1$ and $y’_2$ be the semi-averages placed against the times $x_1$ and $x_2$. Let the estimated straight line $y’=a+bx$ is to pass through the points ($x_1$, $y’_1$) and …

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