Stats MCQs from books chapter

By: Prof. Dr. Fazal Rehman | Last updated: May 20, 2025

1. : What is the sum of 10 numbers if their mean is 9?
(A) 70
(B) 80
(C) 90
(D) 100

2. : For finding the average speed of a journey, which is the appropriate average?
(A) Geometric mean
(B) Harmonic mean
(C) Arithmetic mean
(D) Mode

3. : What is the geometric mean of two numbers x and y?
(A) xy
(B) x – y
(C) x + y
(D) Square root of xy

4. : If all observations are increased by 10% and the mean of 10 observations is 10, what is the increased observation?
(A) 15
(B) 100
(C) 30
(D) 11

5. : 2, 4, 8, and 64, find the geometric mean of these numbers.
(A) 64
(B) 32
(C) 16
(D) 8

6. : Mean, median, and mode are always ______________ if the distribution is symmetrical.
(A) Never equal
(B) Always equal
(C) Sometimes equal
(D) None of these

7. : What is the harmonic mean of two numbers x and y?
(A) 2xy/x + y
(B) xy/x + y
(C) x + y/xy
(D) 2/x + y

8. : Coding method is used for calculation of the
(A) Weighted mean
(B) Median
(C) Mean
(D) Mode

9. : Two numbers 5 and 4 are AM and GM of numbers respectively. Then find the HM of the numbers.
(A) 25/16
(B) 2/5
(C) 16/5
(D) 2/5

10. : Mode of the series 2, 2, 2, 2, 3, 3, 4, 4, 3, 2, 2, 3, 4
(A) 2
(B) 3
(C) 4
(D) None of these

11. : It is impossible to calculate ________________ if any value in the series is zero.
(A) Geometric mean
(B) Harmonic mean
(C) Arithmetic mean
(D) Mode

12. : Mode of 2, 3, 4 is
(A) 2
(B) 3
(C) 4
(D) None of these