Theory
Exercises
1. 
Calculate the mean
Difficulty: easy 
3

2. 
Determine the height
Difficulty: easy 
3

3. 
Find the sum of deviations
Difficulty: easy 
3

4. 
Calculate the mean if each value is decreased
Difficulty: easy 
3

5. 
Determine the correct average
Difficulty: medium 
4

6. 
Determine the mean
Difficulty: medium 
4

7. 
Find the mean using direct method
Difficulty: medium 
4

8. 
Calculate the mean using assumed mean method
Difficulty: medium 
4

9. 
Find the value of the variable "a"
Difficulty: medium 
4

10. 
Determine mean using assumed mean method
Difficulty: hard 
5

11. 
Calculate the mean using step deviation method
Difficulty: hard 
5

12. 
Find the new arithmetic mean
Difficulty: hard 
6

Tests
1. 
Training test
Difficulty: easy 
9

2. 
Training test
Difficulty: medium 
11
