A) \[\frac{2}{5}\]
B) \[\frac{3}{5}\]
C) \[\sqrt{2}\]
D) \[\sqrt{3}\]
Correct Answer: C
Solution :
Mean \[\bar{x}=\frac{1+2+3+4+5}{5}=3\] S.D.=\[\sigma \]=\[\sqrt{\frac{1}{n}\sum{x_{i}^{2}-(\bar{x}}{{)}^{2}}}\] =\[\sqrt{\frac{1}{5}(1+4+9+16+25)-9}\]=\[\sqrt{11-9}=\sqrt{2}\].
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