Calculate the mean deviation of 5, 8, 2, 9 and 6
FURTHER MATHEMATICS
WAEC 2019
Calculate the mean deviation of 5, 8, 2, 9 and 6
- A. 5
- B. 4
- C. 3
- D. 2
Correct Answer: D. 2
Explanation
| x | x - \(\bar{x}\) | (x - \(\bar{x}\)) |
5 8 2 9 6 | -1 2 -4 3 0 | 1 2 4 3 0 |
\(\bar{x}\) = \(\frac{30}{5}\) = 6
\(\sum |x - \bar{x}|\)
= 10
Mean deviation = \(\frac{10}{5}\)
= 2
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