Class 9 Statistics Quiz Set 1

1. The mode of the given data: 4, 6, 5, 9, 3, 2, 7, 7, 6, 5, 4, 9, 10, 10, 3, 4, 7, 6, 9, 9 is;

 
 
 
 

2. Find the range of the following data: 25, 18, 20, 22, 16, 6, 17, 15, 12, 30, 32, 10, 19, 8, 11, 20.

 
 
 
 

3. The class mark of the class 90-130 is:

 
 
 
 

4. If each data in the observation is increased by 5, then the mean

 
 
 
 

5. The value which appears very frequently in a data is called:

 
 
 
 

6. The difference between the maximum and minimum values of the given observation is called

 
 
 
 

7. The collection of information, collected for a purpose is called:

 
 
 
 

8. The class mark of the class 100-120 is

 
 
 
 

9. The range of the data:
25, 81, 20, 22, 16, 6, 17,15,12, 30, 32, 10, 91, 8, 11, 20 is

 
 
 
 

10. The ratio of the sum of observations and the total number of observations is called:

 
 
 
 

11. Find the maximum value if the range is 38 and the minimum value is 82.

 
 
 
 

12. The mean of x+2, x+3, x+4 and x-2 is:

 
 
 
 

13. Find the value of x, if the arithmetic mean of 4, 5, 6, 7, 8 and x is 7

 
 
 
 

14. The arithmetic mean of the first 5 natural numbers is

 
 
 
 

15. In the class intervals 10-20, 20-30, 20 is included in which interval?

 
 
 
 

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