AP EAMCET · Maths · Statistics
The variance of the variates about their A.M is
- A
- B
- C
- D
Answer & Solution
Correct Answer
(C)
Step-by-step Solution
Detailed explanation
The given observations are 112,116,120,125,132 Now, x¯=∑xin=6055=121 And ∑xi-x¯2=81+25+1+16+121=244 ∴ Variance, σ2=∑xi-x¯2n=2445=48.8
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