Question

A variable ‘x’ takes the following values: 7, 9, 18, 11, 10, 8, 17, 13, 11, 16

Calculate
i. The arithmetic mean of ‘x’
ii. The standard deviation of the value of ‘x‘
iii. The mean deviation of the value ‘x’ about

Answer 1

| X | d(x-x) | d2 |
| 79181110817131116 | -5-36-1-2-45-1-14 | 259361416211165 |
| 120 | 32 | |