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Wednesday, 04 March 2026
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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
Take Free Practice Test On 2026 JAMB UTME, Post UTME, WAEC SSCE, GCE, NECO SSCE
  • 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 Â
\((x - \bar{x})^{2}\) 4 1 0 1 4 10



Mean = \(\frac{15}{5} = 3\)
\(Variance = \frac{\sum (x - \bar{x})^{2}}{n}\)
= \(\frac{10}{5}\)
= \(2.0\)
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