Question

Where the two lines intersect.
18) The following table shows the number of hours the children watched TV:
HOURS
0-5
5-10
10-15
15 - 20
20-25
NUMBER OF CHILDREN
15
12
8
6
4
Represent the above data by a frequency polygon.​

Answer 1

To draw the Ogive or cumulative frequency curve, we need to find out the cumulative frequency.

Class interval 0−10 10−20 20−30 30−40 40−50

Frequency 6 21 16 32 10

Cumulative frequency 6 27 43 75 85

Let us take the scale on X-axis as 1 cm=10 and Y-axis as 1 cm=10 and mark the cumulative frequency against the upper limit of each class interval. Joining these points by a smooth curve, we get ogive or cumulative frequency curve. The curve looks like this.

Answer 2

Step-by-step explanation:

l

------------------------------------------

To draw the Ogive or cumulative

frequency curve, we need to find out the

cumulative frequency.

Class interval0-10 10-20 20-3030-40

40-50

Frequency 6 2116 32 10

Cumulative frequency6 27 43 75 85

Let us take the scale on X-axis as 1 cm=10

and Y-axis as 1 cm=10 and mark thhe

cumulative frequency against the upper

limit of each class interval. Joining these

points by a smooth curve, we get ogive

or cumulative frequency curve. The curve

looks like this.