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Question

A company manufactures car batteries of a particular type. The lives (in years) of 40 such batteries were recorded as follows:
2.63.03.73.22.24.13.54.53.52.33.23.43.83.24.63.72.54.43.43.32.93.04.32.83.53.23.93.23.23.13.73.44.63.83.22.63.54.22.93.6
Construct a grouped frequency distribution table for this data, using class intervals of size 0.5 starting from the intervals 2−2.5.

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Solution

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.
Lives of batteries(in hours)Number of batteries22.522.53.063.03.5143.54.0114.04.544.55.03Total40

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