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<strong>Marking</strong> scheme<br />
331<br />
height<br />
(X)<br />
140<br />
148<br />
150<br />
155<br />
158<br />
165<br />
169<br />
-15<br />
-7<br />
-5<br />
0<br />
3<br />
10<br />
14<br />
∑ ∑ ∑<br />
255<br />
49<br />
25<br />
0<br />
9<br />
100<br />
196<br />
1<br />
Mean ( )<br />
∑<br />
1<br />
Finding d 2<br />
Standard Deviation ( )<br />
√ ∑<br />
√<br />
1<br />
√<br />
Coefficient of variation<br />
1<br />
10
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