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What is the mean of the numbers 1,2,3, , 10 with frequencies ^9 c₀, ^9 c₁, ^9 c₂, , ^9 c₉ , respectively?

Options

  1. A1.1 2^8
  2. B1.2 7^4
  3. C5.5
  4. D0.55

Correct answer

C. 5.5

Step-by-step solution

aligned Mean & = f _ i x _ i f _ i = 1 ^9 C ₀+2 ^9 C ₁+ +10 ^9 C ₉ ^9 C ₀+ ^9 C ₁+ ^9 C ₂+ + ^9 C ₉ & = 11 2^8 2^9 =5.5 aligned

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