Question

Standard deviation $3,5,7,9,11,13$ is

• A. $\sqrt{\frac{35}{3}}$
• B. $11$
• C. $11.66$
• D. $3.4$

Answer 1

Answer: (A)

Mean $=8$
$S.D\cdot =\sigma =\sqrt{\frac{1}{n}\sum x_1^2-(\bar{x}{)}^2}$
$=\sqrt{\frac{454}{6}-(8{)}^2}=\sqrt{\frac{35}{3}}$
$\therefore S.D\cdot =\sqrt{\frac{35}{3}}$