Question

Define mean or arithmetic mean or average .

Answer 1

The "mean" is the "average" you've used to, where you add up all the numbers and then divide by the number of numbers.


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Answer 2

MEAN OR ARITHMETIC MEAN OR AVERAGE :  

The mean of a number of observation is the sum of the values of all the observations divided by the total number of observations.

MEAN = Σfixi / Σfi

[‘Σ’ Sigma means ‘summation’ .

Mean = Sum of all the observations / Total number of observations.

We can calculate the mean of grouped data by the following three methods :

1.DIRECT METHOD:

2. ASSUMED MEAN METHOD

3. STEP DEVIATION METHOD

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