Question

what is class mark?How to find it?​

Answer 1

Answer:

Class mark: Mid-value of each class interval is called its class mark.

To calculate the mean of grouped data, the first step is to determine the midpoint (also called a class mark) of each interval, or class. These midpoints must then be multiplied by the frequencies of the corresponding classes. The sum of the products divided by the total number of values will be the value of the mean.

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Answer 2

Answer:

i hope it helps you ....xd

chaudhary