Question
We have to draw a histogram with the help of following data. What amendment will be make in class intervals for doing so?
|
Weight (in kg.) Class interval |
No. of Students frequencies (f) |
|
10 – 19 |
4 |
|
20 – 29 |
12 |
|
30–39 |
15 |
|
40 – 49 |
20 |
|
50 – 59 |
10 |
|
60 – 69 |
5 |
Solution
Here the series is not continuous. Hence, we have to make it continuous for doing so, we will divide the difference of class boundaries by 2. The resultant figure i.e. 5 by be deducted from the lower limit and added in the upper limit. Hence:
|
Weight (in kg.) Class interval |
No. of Students frequencies (f) |
|
9.5 – 19.5 |
4 |
|
19.5 – 29.5 |
12 |
|
29.5 – 39.5 |
15 |
|
39.5 – 49.5 |
20 |
|
49.5 – 59.5 |
10 |
|
59.5 – 69.5 |
5 |
