Class 11 Maths Statistics Mean

Mean: Let’s find the average scores.

Average Score of Mary is  (10+8+9+8+7)/5  =8.4

Average Score of Hari  is (4+7+10+10+10)/5 = 8.2

Based on the Mean data, Mary has performed better.

 

The mean (or average) of a number of observations is the sum of the values of all the observations divided by the total number of observations. It is denoted by ‘x bar’.

All data is given equal importance in Mean, the extreme values are not ignored.

 

For Ungrouped data, 

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