Maths-
General
Easy

Question

A random variable X has the probability distribution given below. Its variance is

  1. fraction numerator 4 over denominator 3 end fraction    
  2. fraction numerator 5 over denominator 3 end fraction    
  3. fraction numerator 10 over denominator 3 end fraction    
  4. fraction numerator 16 over denominator 3 end fraction    

The correct answer is: fraction numerator 4 over denominator 3 end fraction


    capital sigma P open parentheses X equals x subscript i end subscript close parentheses equals 1 comma V left parenthesis x right parenthesis equals capital sigma x subscript i end subscript superscript 2 end superscript P open parentheses X equals x subscript i end subscript close parentheses minus mu to the power of 2 end exponent

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