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### Theory

 1 Introduction 2 Mean - ungrouped frequency distribution 3 Mean - grouped frequency distribution 4 Direct method 5 Assumed mean method 6 Step deviation method

### Exercises

 1 Determine the mean using direct method Difficulty: easy 3 2 Calculate the mean Difficulty: medium 4 3 Calculate the mean using step deviation method Difficulty: medium 4 4 Find the missing frequencies Difficulty: medium 4 5 Determine the value of the frequency 'f' Difficulty: medium 4 6 Find the missing frequency 'x' Difficulty: medium 4 7 Find the mean using direct method Difficulty: medium 4 8 Find the value of the variable "a" Difficulty: medium 4 9 Calculate the mean Difficulty: medium 4 10 Find the mean weight of the students Difficulty: hard 5 11 Find the mean number of patients Difficulty: hard 5 12 Calculate the mean income of employees Difficulty: hard 5 13 Assertion and reasoning: Mean of grouped data Difficulty: hard 5 14 Calculate the mean using step deviation method Difficulty: hard 5 15 Determine mean using assumed mean method Difficulty: hard 5

### Tests

 1 Training test I Difficulty: medium 11 2 Training test II Difficulty: medium 12 3 Training test III Difficulty: hard 12

### Teacher manual

 1 Methodical recommendation