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The variance of the scores 1, 2, 3, 4, 5 is

The variance of the scores 1, 2, 3, 4, 5 is

  • A.
    1, 2
  • B.
    1, 4
  • C.
    2.0
  • D.
    3.0
Correct Answer: Option C
Explanation
(x) 1 2 3 4 5 sum =15
(x – bar{x}) -2 -1 0 1 2  
((x – bar{x})^{2}) 4 1 0 1 4 10

Mean = (frac{15}{5} = 3)

(Variance = frac{sum (x – bar{x})^{2}}{n})

= (frac{10}{5})

= (2.0)