PUMPA - THE SMART LEARNING APP

Helps you to prepare for any school test or exam

### Theory

 1 Introduction to statistics 2 Collection of data 3 Getting the facts sorted out 4 Measures of central tendency 5 Arithmetic mean - Raw data 6 Arithmetic mean - ungrouped frequency distribution 7 Arithmetic mean - grouped frequency distribution 8 Direct method 9 Assumed mean method 10 Step deviation method 11 A special property of arithmetic mean

### 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

### Teacher manual

 1 Methodical recommendation