Mean of grouped data. Maths TNSB Mentoring, Class 9: lessons, tests, tasks.

1.	TBQ - Step deviation method Difficulty: medium	5
2.	TBQ - Find the mean using direct method Difficulty: medium	5
3.	Find the value of the variable "a" Difficulty: medium	5
4.	Determine mean using assumed mean method Difficulty: hard	5
5.	Calculate the mean using step deviation method Difficulty: hard	5

Methodical recommendation

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Mean of grouped data