Calculate the standard deviation of the following marks; 2, 3, 6, 2, 5, 0, 4, 2

A.
1.5 
B.
1.7 
C.
1.8 
D.
1.9
Correct Answer: Option C
Explanation
x  2  3  6  2  5  4  2  24  
x – (bar{x})  1  3  1  2  3  1  1  
((x – bar{x})^2)  1  9  1  4  9  1  1  26 
Mean = (frac{24}{8} = 3)
Standard deviation = (sqrt{frac{26}{8}})
= (sqrt{3.25})
= 1.802 (approeq) 1.8