MCQ
A modified version of Karl Pearson's formula is:
- A$\text{r}=\frac{\Sigma\text{xy}}{\Sigma\text{x}^2.\Sigma\text{y}^2}$
- ✓$\text{r}=\frac{\Sigma\text{xy}}{\sqrt{\Sigma\text{x}^2\times\Sigma\text{y}^2}}$
- C$\text{r}=\frac{\Sigma\text{xy}}{\text{n}\Sigma\text{x}^2.\Sigma\text{y}^2}$
- D$\text{r}=\frac{\Sigma\text{xy}}{\text{n}\delta\text{x}.\delta\text{y}}$