Class 9 Statistics Quiz Set 1

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

 
 
 
 

2. 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;

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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