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

Related Mcqs:

1. 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

2. The mean of 10 numbers is 9, then sum of these numbers will be__________________?

   A. 9
   B. 0.9
   C. 70
   D 90

3. 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

4. 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

5. 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

6. The middle value of an ordered array of numbers is the____________?

   A. Mode
   B. Mean
   C. Median
   D. Mid Point

7. Which of the following describe the middle part of a group of numbers ?

   A. Measure of Variability
   B. Measure of Central Tendency
   C. Measure of Association
   D. Measure of Shape

8. Arithmetic mean of two positive numbers “X” and “Y” is_________________?

   A. ab2
   B. 2a2
   C. (a+b)/2
   D. a−b2
   E. 2a+b

9. The average of first n natural numbers is_______________?

   A. n+12
   B. n2
   C. All of the above
   D. None of these

10. The Harmonic Mean of any two numbers is________________?

    A. a+b2
    B. 2aba+b
    C. ab−−√
    D. a+b