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 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 hours)
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
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 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
