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.
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 years) |
Number of batteries |
|
2 - 2.5 |
2 |
|
2.5 - 3.0 |
6 |
|
3.0 - 3.5 |
14 |
|
3.5 - 4.0 |
11 |
|
4.0 - 4.5 |
4 |
|
4.5 - 5.0 |
3 |
|
Total |
40 |
