The following table shows the daily pocket money (in ₹) received by 40 students of a class. The class intervals are discontinuous.
Daily pocket money (₹) | Number of students
0–5 | 4
6–10 | 8
11–15 | 12
16–20 | 9
21–25 | 5
26–30 | 2
Answer the following questions.
(i) State what is meant by lower class limit, upper class limit and class boundary.
(ii) Explain why the given class intervals must be converted to continuous form before a histogram is drawn.
(iii) Rewrite the above distribution using continuous class intervals, clearly showing the new class boundaries.