Question

For the following frequency distribution, draw a cumulative frequency curve of less than type of vive and find the
medium from graph
Class Intervals
0-10
10-20
20-30
30-40
40 -50
50-60
60-70
Frequency
5
3
9
13
7
11
2​

Answer 1

Answer:

Step-by-step explanation:

We first prepare the cumulative frequency distribution table by less than method as given below:

Marks No. of Students Marks less than Cumulative Frequency

0-10 7 10 7

10-20 10 20 17

20-30 23 30 40

30-40 51 40 91

40-50 6 50 97

50-60 2 60 100

Other than the given class intervals, we assume a class -10-0 before the first class interval 0-10 with zero frequency.

Now, we mark the upper class  limits ( including the imagined class) along x-axis on a suitable scale.

Thus, we join the plotted points by a free hand curve to obtain the required ogive as shown Fig 1 In order to obtain the cumulative frequency polygon, we join the plotted points by line segments