Question

[4]
Construct a frequency polygon for the following frequency distribution, using a
graph sheet.
40-50
50-60
60 - 70
70-80
80 - 90
90 - 100
Marks
No. of
"
students
7
I 18
I 26
| 37
| 20
|
6
Use 2 cm = 10 marks
2 cm = 5 students​

Answer 1

Construction of frequency polygon for the given frequency distribution:

Marks        Number of students

40-50                7

50-60               18

60-70               26

70-80               37

80-90               20

90-100               6

• Marks are taken on X-axis and number of students on Y-axis.
• Scale is set as 2 cm = 10 marks on X-axis and 2 cm = 5 students.
• Frequency polygon is drawn by joining the points plotted by midpoints against the frequencies using ruler.