The term variance introduced by ___________?

Related Mcqs:

1. 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

2. 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

3. 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

4. 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

5. 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

6. Variance is always calculated from___________?

   A. Mean
   B. Variance
   C. Geometric Mean
   D. Median
   E. Mode

7. Mean Deviation, Variance and Standard Deviation of the values 4, 4, 4, 4, 4, 4 is_________________?

   A. 4
   B. 8
   C. 2
   D. 12
   E. 0

8. Lowest value of variance can be________________?

   A. 1
   B. -1
   C. 3
   D. -3
   E. 0

9. The variance of a constant is_______________?

   A. Zero
   B. Constant
   C. a
   D. None

10. The calculation of mean and variance is based on______________?

    A. Small values only
    B. Large values only
    C. Extreme values only
    D. All values