MCQ
Which of The Following is Not Correctly Matched.
- AActual Mean Method $\quad-\sigma=\sqrt{\left(\frac{\sum(x-\bar{x})^2}{n}\right)}$
- BDeviation from assumed mean $\quad-\sigma=\sqrt{\frac{\sum d^2}{ N }-\frac{\left(\sum d\right)^2}{(n)}}$
- CKarl Pearson's co-effecient $\quad-r=\frac{ N \sum X y-\left(\sum X \right)\left(\sum y\right)}{\sqrt{ N \sum X ^2-\left(\sum X \right)^2} \sqrt{ N \sum Y ^2-\left(\sum y\right)^2}}$
- ✓Deviation from actual mean $ -r=\frac{\Sigma X y}{\sqrt{\sum XX ^2 \Sigma YY ^2}} $