Thirty children were asked about the number of hours they watched TV programmes in the previous week. The results were found as follows:
Make a grouped frequency distribution table for this data, taking class width as 5 and one of the class intervals as 5- 10.
Our class intervals will be 0−5, 5− 10,10 −15…..
The grouped frequency distribution table can be constructed as follows.
In the above frequency table the classes are continuous. So, the values that belongs to a class should be greater than or equal to the lower class but shold be less than the upper class.
Example: The value 10 will belong to the class 10-15 but not in 5-10.