MCQ
Which of the following pair is correctly matched? Method Direct Method:
| S. No. | Method | Formula |
| (i) | Direct Method | $\text{r}=\frac{\Sigma\text{dxdy.n}-(\Sigma\text{dx})(\Sigma\text{dy})}{\sqrt{\Sigma\text{dx}^2.\text{n}(\Sigma\text{dx})^2(\sqrt{\Sigma\text{dy}^2-(\Sigma\text{dy})^2}}}$ |
| (ii) | Short-Cut Method | $\text{r}=\frac{\Sigma\text{xy}}{\text{n}.\sigma_\text{x}.\sigma_\text{y}}$ |
| (iii) | Step Deviation Method | $\text{r}=\frac{\text{dx'dy'.n}-(\Sigma\text{dx'})(\Sigma\text{dy'})}{\sqrt{\Sigma\text{dx'}.\text{n}(\Sigma\text{dx'})^2(\sqrt{\Sigma\text{dy'}-(\Sigma\text{dy'})^2}}}$ |
- AOnly (i)
- BOnly (ii)
- ✓Only (iii)
- DBoth (ii) and (iii).