Question
With the help of data given calculate Standard Deviation.
15, 18, 20, 12, 10, 9, 11.
Solution
Calculation of Standard Deviation:
|
Values |
X – |
d2 |
|
X |
|
|
|
15 |
3 |
9 |
|
18 |
6 |
36 |
|
20 |
8 |
64 |
|
12 |
0 |
0 |
|
10 |
-2 |
4 |
|
9 |
-3 |
9 |
|
11 |
-1 |
1 |
|
N = 7 |
Σd = 11 |
Σd2 = 123 |
= d12Apply the formula = Standard Deviation or
After putting the values
