Question

Construct a histogram for the following:

Class interval
10 – 20
20 – 30
30 – 40
40 – 50
50 – 60

Frequency
3
5
6
4
2
​

Answer 1

Answer: Take the class-intervals along the X-axis and frequencies along the Y-axis with appropriate scale as shown.  

Now mark the mid points of the upper sides of the consecutive rectangles. We also make the midpoints of the assumed class intervals 0−10 and 90−100. The mid points are joined with the help of a ruler. The ends of the polygon are joined with the mid points of 0−10 and 90−100. Now, we get the frequency polygon.

Step-by-step explanation:

Answer 2

Answer:

Take the class-intervals along the X-axis and frequencies along the Y-axis with appropriate scale as shown.

Now mark the mid points of the upper sides of the consecutive rectangles. We also make the midpoints of the assumed class intervals 0−10 and 90−100. The mid points are joined with the help of a ruler. The ends of the polygon are joined with the mid points of 0−10 and 90−100. Now, we get the frequency polygon.

solution