Question

A company manufactures car batteries of a particular type. The lives (in years) of 40 such batteries were recorded as follows: 

2.6 3.0 3.7 3.2 2.2 4.1 3.5 4.5 3.5 2.3 3.2 3.4 3.8 3.2 4.6 3.7 2.5 4.4 3.4 3.3 2.9 3.0 4.3 2.8 3.5 3.2 3.9 3.2 3.2 3.1 3.7 3.4 4.6 3.8 3.2 2.6 3.5 4.2 2.9 3.6 

Construct a grouped frequency distribution table for this data, using class intervals of size 0.5 starting from the intervals 2 − 2.5. 

Answer 1

A grouped frequency table of class size 0.5 has to be constructed, starting from class interval 2 − 2.5. 

Therefore, the class intervals will be 2 − 2.5, 2.5 − 3, 3 − 3.5… 

By observing the data given above, the required grouped frequency distribution table can be constructed as follows.