Find the standard deviation of 2 3 8 10 and 12 - JAMB Mathematics 2012 Question
Find the standard deviation of 2,3,8,10 and 12
A
3.9
B
4.9
C
5.9
D
6.9
correct option: a
\(\begin{array}{c|c} x & (x - \varkappa) & (x - \varkappa)^2 \ \hline 2 & -5 & 25 \ \hline 3 & -4 & 16 \ \hline 8 & 1 & 1 \ \hline 10 & 3 & 9 \ \hline 12 & 5 & 25 \ \hline & & 76
\end{array}\)
S.D = \(\sqrt{\frac{(x - \varkappa)^2}{n}}\)
S.D = \(\sqrt{\frac{76}{5}}\)
S.D = 3.9
\end{array}\)
S.D = \(\sqrt{\frac{(x - \varkappa)^2}{n}}\)
S.D = \(\sqrt{\frac{76}{5}}\)
S.D = 3.9
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