A company manufactures car batteries of a particular type. The lives (in years) of 40 such batteries were recorded as follows:
Construct a grouped frequency distribution table for this data, using class intervals of size 0.5 starting from the interval 2 - 2.5.
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 |
Solution:
The required grouped frequency distribution table can be constructed as follows, with class intervals of ‘2-2.5’, ‘2.5 - 3’, ‘3-3.5’, ‘3.5 - 4’, and so on.
LIFE SPAN OF BATTERIES (in years) |
NUMBER OF BATTERIES (frequency) |
2 - 2.5 2.5 - 3.0 3.0 - 3.5 3.5 - 4.0 4.0 - 4.5 4.5 - 5.0 |
2 6 14 11 4 3 |
TOTAL |
40 |
Video Solution:
A company manufactures car batteries of a particular type. The lives (in years) of 40 such batteries were recorded as follows: Construct a grouped frequency distribution table for this data, using class intervals of size 0.5 starting from the interval 2 - 2.5.
NCERT Solutions for Class 9 Maths - Chapter 14 Exercise 14.2 Question 9:
Summary:
It is given that the company manufactures car batteries of a particular type. The lives (in years) of 40 such batteries were recorded. We have prepared a grouped frequency distribution table for this data using class intervals of size 0.5 starting from the interval 2 - 2.5.