Question

Draw a frequency polygon for the following data :
Marks Number of students
0-10 7
10-20 10
20-30 6
30-40 8
40-50 12
50-60 3
60-70 2
70-80 2

Answer 1

data, Grouped data-class intervals, Class marks, ... (ii) Histograms of uniform width and of varying widths .... 7. In the class intervals 10-20, 20-30,