Bot, please answer this % score 11 - 20 21 - 30 31 - 40 41 - 50 51 - 60 61 - 70 71 - 80 81- 90
No of pupils 60 190 300 400 480 320 170 80
a) Prepare a cumulative frequency table
b) Draw a cumulative frequency polygon
a)
% Score | No of Pupils | Cumulative Frequency
--------|--------------|---------------------
11 | 60 | 60
21 | 190 | 250
31 | 300 | 550
41 | 400 | 950
51 | 480 | 1430
61 | 320 | 1750
71 | 170 | 1920
81 | 80 | 2000
91 | 0 | 2000
b)
2000 |
|
1800 | .___.
| ._.' '~--~--._
1600 | _.'_ .'
| .-' '-.
1400 |_.' '-
|
1200 |
| ..---''+.
1000 | _ ..--''' |
| _.-''|.-'' .'
800 | _.-'' .-' .'+--.._
|_.--'' .' ~-.
600 | _..___.-' |
| .--''''' __...__ |
400 |_.'_ / / ,'. |
| | | | | _...--...._ .'
200 | \ \ `,./ .` `'''----''' _.'
| `\"`, __.-''
0 +---------------|---------------------|--------------|---
11 31 51 71 81