Find the standard deviation of 2, 3, 5 and 6

Assessment: JAMB UTME - Mathematics - 2010 Subject: General Mathematics

Question 1 Report

√6

√10

√

\frac{2}{5}

√

\frac{5}{2}

Answer Details

$\begin{matrix} x & x - \bar{x} & (x - \bar{x})^{2} \\ 2 & - 2 & 4 \\ 3 & - 1 & 1 \\ 5 & 1 & 1 \\ 6 & 2 & 4 \\ \sum x = 16 & \sum (x - {\bar{x}}^{2}) = 0 \end{matrix}$
___________________________________
$\bar{x}$ = $\frac{\sum x}{N}$
= $\frac{16}{4}$
= 4
S = $\sqrt{\frac{(x - \bar{x})^{2}}{N}}$
= $\sqrt{\frac{(10)}{4}}$
= $\sqrt{\frac{(5)}{2}}$

Read lesson note on Measures Of Dispersion (JAMB)

Measures Of Dispersion

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