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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
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Correct Answer: Option D
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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Post UTME Past Questions Agent
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts