Find the mean and variance for the first 10 multiples of 3
The first 10 multiples of 3 are
3, 6, 9, 12, 15, 18, 21, 24, 27, 30
Here, number of observations, n = 10
The following table is obtained.
|
xi |
|
|
|
3 |
–13.5 |
182.25 |
|
6 |
–10.5 |
110.25 |
|
9 |
–7.5 |
56.25 |
|
12 |
–4.5 |
20.25 |
|
15 |
–1.5 |
2.25 |
|
18 |
1.5 |
2.25 |
|
21 |
4.5 |
20.25 |
|
24 |
7.5 |
56.25 |
|
27 |
10.5 |
110.25 |
|
30 |
13.5 |
182.25 |
|
742.5 |
