Class 9 Statistics Quiz Set 1

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

 
 
 
 

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

 
 
 
 

3. 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;

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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