x
15
21
17
26
18
29
-6
0
-4
5
-3
-8
36
16
25
9
64
Standard deviation = ∑(x−x‾)2n\sqrt{\frac{\sum(x - \overline{x})^2}{n}}n∑(x−x)2
= 1506\frac{150}{6}6150
= 25\sqrt{25}25
= 5
