Q. 9.    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 interval 2 - 2.5.

Answers (1)

The least value of life of a battery recorded = 2.2

The highest value of life of a battery recorded = 4.6

The class intervals with interval size 0.5 would therefore be 2.0 - 2.5, 2.5 - 3.0, 3.0 - 3.5, 3.5 - 4.0, 4.0 - 4.5, 4.5 - 5.0

The representation of the given data in the form of a frequency distribution table is as follows.

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