Stats MCQs from books chapter

Stats MCQs from books chapter

1. what is the sum of 10 numbers if there 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 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

8. Coding method is used for calculation of the

A. weighted mean
B. Median
C. mean
D. mode

9. Two number 5 and 4 are Am and GM of numbers respectively then find HM of 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 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