Grouped Data Arithmetic Mean Tutorial

Grouped Data Arithmetic Mean Tutorial

Grouped Data Arithmetic Mean Definition:

Data arising from organising n observed values into a smaller number of disjoint groups of values, and counting the frequency of each group; often presented as a frequency table.

Formula:

Grouped Data Arithmetic Mean :
Arithmetic Mean = ΣfX/Σf
Where,

X = Individual score f = Frequency

Grouped Data Arithmetic Mean Example:

To find the Arithmetic Mean of 1,2,3,1,2,3,2. The arithmetic mean = 1+2+3+1+2+3+2/7 = 14/7 = 2 In this case there are two 1's, three 2's and two 3's. The number of times each number occurs is called its frequency. This can be clearly given in a table as below.

X ValueFrequency(f)ΣfX
121 * 2 = 2
232 * 3 = 6
323 * 2 = 6
Step 1:

Find Σf. Σf = 7

Step 2:

Now, find ΣfX. ΣfX = ((1*2)+(2*3)+(3*2)) = 14

Step 3:

Now, Substitute in the above formula given Arithmetic mean = ΣfX/Σf = 14/7 = 2 The above example will lead you to calculate the Grouped data Arithmetic Mean manually.

This tutorial will help you dynamically to find the Grouped data Arithmetic Mean problems.

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