A) \[\frac{833}{4}\]
B) 833
C) 437
D) \[\frac{437}{4}\]
Correct Answer: B
Solution :
\[{{\sigma }^{2}}=\left( \frac{\sum{x_{i}^{2}}}{n} \right)-{{\overline{x}}^{2}}\] \[\overline{x}=\frac{\sum\limits_{r\,=\,1}^{50}{2r}}{50}=51\] \[{{\sigma }^{2}}=\frac{\sum\limits_{r\,=\,1}^{50}{4{{r}^{2}}}}{50}-{{(51)}^{2}}=833.\]
You need to login to perform this action.
You will be redirected in
3 sec
