(ii) Following is the frequency distribution with unknown frequencies :
Class 20 – 30 30 – 40 40 – 50 50 – 60 Total
Frequency a 2a 3a a 70
Find the value of a and prepare a frequency distribution table for drawing a
frequency polygon. Draw a frequency polygon.
Answers
Answered by
0
Following is the frequency distribution with unknown frequencies :
Class 20 – 30 30 – 40 40 – 50 50 – 60 Total
Frequency a 2a 3a a 70
Given,
From given data we have,
a + 2a + 3a + a = 70
7a = 70
a = 70/7
a = 10
a = 10, 2a = 10, 3a = 30
Frequency distribution table
Class Frequency
20 – 30 10
30 – 40 20
40 – 50 30
50 – 60 10
The diagram of frequency polygon is attached below.
Attachments:
Similar questions