Variance is always calculated from___________?

Related Mcqs:

1. Standard deviation is always calculated from _____________?

   A. Mean
   B. Median
   C. Mode
   D. G.M.

2. A parameter is a measure which is computed from___________?

   A. Population data
   B. Sample data
   C. Test statistics
   D. None of these

3. The variance of 5 numbers is 10. If each number is divided by 2, then the variance of new numbers is______________?

   A. 20
   B. 5
   C. 2.5
   D. 5.5
   E. 0

4. Suppose for 40 observations, the variance is 50. If all the observations are increased by 20, the variance of these increased observation will be______________?

   A. 50
   B. 70
   C. 50/20
   D. 50-20 = 30
   E. 50

5. Variance of binomial distribution is always:______________?

   A. Less than mean
   B. Greater than mean
   C. Equal to mean
   D. Less than equal to mean

6. The variance of binomial distribution is always:________________?

   A. Less than mean
   B. Equal to mean
   C. Greater than mean
   D. Equal to standard deviation
   E. None of these

7. Sample variance S2 is unbiased estimator of population variance 26 because ________________?

   A. E(S2) = s2
   B. E(u) = X
   C. E(P) = P
   D. Ux = u

8. suppose for 40 observation, the variance is 50. If all the observation are increased by 20, the variance of these increased observation will be_________?

   A. 50
   B. 70
   C. 50/20
   D. 50-20=30

9. The variance of 5 numbers is 10. If each number is divided by 2, then variance of new number is_____________?

   A. 20
   B. 5
   C. 2.5
   D. 0

10. Standard deviation is calculated from the Harmonic Mean (HM) ________________?

    A. Always
    B. Sometimes
    C. Never
    D. None of these