UPSKILL MATH PLUS

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Measures of Central Tendency and Arithmetic Mean

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
12.	Mindmap

1.	Multiple choice questions I Difficulty: easy	3
2.	Multiple choice questions II Difficulty: easy	2
3.	Multiple choice questions III Difficulty: easy	3
4.	Two mark example problems I Difficulty: easy	4
5.	Two mark example problems II Difficulty: easy	4
6.	Two mark exercise problems I Difficulty: easy	4
7.	Two mark exercise problems II Difficulty: easy	4
8.	Five mark example problems I Difficulty: medium	5
9.	Five mark example problems II Difficulty: hard	10
10.	Five mark exercise problems I Difficulty: hard	10
11.	Five mark exercise problems II Difficulty: hard	10

1.	Calculate the mean Difficulty: easy	2
2.	Determine the height Difficulty: easy	2
3.	Find the sum of deviations Difficulty: easy	2
4.	Calculate the mean if each value is decreased Difficulty: easy	2
5.	Determine the correct average Difficulty: medium	2
6.	Determine the mean Difficulty: medium	5
7.	Find the mean using direct method Difficulty: medium	5
8.	Calculate the mean using assumed mean method Difficulty: medium	5
9.	Find the value of the variable "a" Difficulty: medium	5
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	5

1.	Find the discarded number Difficulty: easy	1
2.	Determine the correct mean Difficulty: easy	2

1.

Methodical recommendation

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