general math MCQ #12052

For the data 2, 4, 4, 6, 8, the variance is: Mean=4.8 (sum=24/5). Deviations: -2.8,-0.8,-0.8,1.2,3.2. Squared: 7.84,0.64,0.64,1.44,10.24. Variance = 20.8/5 = 4.16

general math MCQ #12052

  1. Question 1

    Q1. For the data 2, 4, 4, 6, 8, the variance is: Mean=4.8 (sum=24/5). Deviations: -2.8,-0.8,-0.8,1.2,3.2. Squared: 7.84,0.64,0.64,1.44,10.24. Variance = 20.8/5 = 4.16

    • A) 3.36
    • B) 3.84
    • C) 3.96
    • D) 4.16

    Answer: 4.16

    Explanation: With mean = 4.8, the squared deviations are 7.84, 0.64, 0.64, 1.44, and 10.24; their average is 20.8/5 = 4.16.