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A day full of math games & activities. Find one near you.
A day full of math games & activities. Find one near you.
A day full of math games & activities. Find one near you.
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 |
☛ Check: NCERT Solutions Class 9 Maths Chapter 14
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.
☛ Related Questions:
- Three coins were tossed 30 times simultaneously. Each time the number of heads occurring was noted down as follows: 0 1 2 2 1 2 3 1 3 0 1 3 1 1 2 2 0 1 2 1 3 0 0 1 1 2 3 2 2 0 Prepare a frequency distribution table for the data given above.
- The value of π up to 50 decimal places is given below:3.14159265358979323846264338327950288419716939937510i) Make a frequency distribution of the digits from 0 to 9 after the decimal point.ii) What are the most and the least frequently occurring digits?
- Thirty children were asked about the number of hours they watched TV Programmes in the previous week. The results were found as follows: 1 6 2 3 5 12 5 8 4 8 10 3 4 12 2 8 15 1 17 6 3 2 8 5 9 6 8 7 14 12 i) Make a grouped frequency distribution table for this data, taking class width 5 and one of the class intervals as 5 - 10. ii) How many children watched television for 15 or more hours a week?
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