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Following table gives marks in Statistic...

Following table gives marks in Statistics of the students of a class.
Find out mean marks.
`{:("Mid-value",5,10,15,20,25,30,35,40),("Number of Students",5,7,9,10,8,6,3,2):}`

Text Solution

Verified by Experts

In this series, mid-values are already given. The calculation of arithmetic mean involves the same procedure as in the case of exclusive series.

`barX= (sumfm)/(sumf)=995/50=19.9`
Mean Marks = 19.
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TARUN JAIN & VK OHRI-MEASURES OF CENTRAL TENDENCY - ARITHMETIC MEAN-Illustration
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