Question

How to find class intervals when mid value is given

Answer 1

To calculate the class interval, first step is to rewrite the table by including the values of mid-interval in place of the values given in range. Then the sum of all the mid- interval values is calculated.

The sum is then multiplied with the frequency which is already divided by total number of values present in the range.

Answer 2

Answer:

$Class\:interval\\ = \left(x_{i}-\frac{h}{2},x_{i}+\frac{h}{2}\right)$

Step-by-step explanation:

$Let \: mid \: value = x_{i},\\class \: size (h) \\= Difference \: between \: any \:two \\ consecutive \: mid\: values$

$Now,\\Class\:interval\\ = \left(x_{i}-\frac{h}{2},x_{i}+\frac{h}{2}\right)$

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