Multiple choice Questions

1. Which of the following is not a measure of central tendency?     (       )
     A. Mean     B. Median       C. Mode       D. Range
 

2. The Arithmetic mean of first ‘n’ natural numbers is______       (       )

3. Which of the following cannot be determined graphically?       (       )
     A. Mean      B. Median     C. Mode      D. All
 

4. Mode is _____ frequent value.              (       )
     A. least     B. most      C. first      D. middle most
 

5. The median of a given frequency distribution is found graphically with the help of ____  (       )
      A. histogram     B. frequency curve     C. frequency polygon       D. ogive
 

6. The algebraic sum of the deviations of a frequency distribution from its mean is _____  (       )
     A. always positive    B. always negative     C. 0     D. a non-zero number
 

7. The mean of ‘n’ observations is . A constant score ‘a’ is to be added to each observation then the new mean is ______             (       )

8. The mean of ‘n’ observations is . If the first observation is increased by 1, the second by 2, the third by 3, and so on, then the new mean is ______     (       )

 

  (       )
      A. 23       B. 25        C. 27           D. 20
 

10. If 35 is removed from the data 30, 34, 35, 36, 37, 38, 39, 40 then the median increases by  (       )
       A. 2      B. 1.5       C. 1       D. 0.5
 

11. If the mean of first ‘n’ natural numbers is 15, then n =           (       )
       A. 15       B. 30       C. 14        D. 29
 

12. If the arithmetic mean of 7, 8, x, 11, 14 is x, then x =           (       )
       A. 9         B. 9.5      C. 10        D. 10.5
 

13. The mean of first ‘n’ odd natural numbers is  then n =      (       )
       A. 9         B. 81        C. 27        D. 18
 

14. The mean of first ‘n’ natural numbers is  then n =      (       )
       A. 5         B. 4          C. 9          D. 10
 

15. The mean of 6, 7, x, 8, y, 14 is 9, then            (       )
       A. x + y = 21     B. x + y = 19      C. x – y = 19     D. x – y = 21
 

16. If the mean of a frequency distribution is 8.1 and Σ𝑓_𝑖𝑥_𝑖 = 132 + 5𝑘, Σ𝑓_𝑖 = 20, then 𝑘 = _____   (       )
       A. 3         B. 4           C. 5          D. 6
 

17. The median of first 10 prime numbers is _____                                         (       )
       A. 11         B. 12         C. 13            D. 14
 

18. The mode of the data 64, 60, 48, x, 43, 48, 43, 34 is 48, then x - 3 =             (       )
        A. 44        B. 45         C. 46          D. 48
 

19. The mean of x, x + 3, x + 6, x + 9 and x + 12 is 10, then x =____              (       )
       A. 1         B. 3            C.4              D.6 
 

20. Median of the data 17, 28, 14, 36, 45, 54, 19, 37, 44 is______             (       )
        A. 36          B. 37         C. 28           D. 36.5
 

Answers: 1. D; 2. B; 3. A; 4. B; 5. D; 6. C; 7. A; 8. B; 9. C; 10. D.; 11. D; 12. C; 13. B; 14. C; 15. B; 16. D.; 17. B; 18. B; 19. C; 20. A.
 

Dr. T.S.V.S. Suryanarayana Murthy