Question

# Thirty children were asked about the number of hours they watched TV programmes in the previous week. The results were found as follows: 1623512584810341228151176328596871412 Make a grouped frequency distribution table for this data, taking class width as 5 and one of the class intervals as 5- 10.

A

HoursNumber of children0511510121015515202Total30

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B

HoursNumber of children0510510131015515202Total30

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C

HoursNumber of children0510510141015415202Total30

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D

None of the above

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Solution

## The correct option is B HoursNumber of children0−5105−101310−15515−202Total30 Our class intervals will be 0−5, 5− 10,10 −15….. The grouped frequency distribution table can be constructed as follows. HoursNumber of children0−5105−101310−15515−202Total30 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.

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