## 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.Â 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 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