In a study of diabetic patients in a village, the following observations were noted. Age in years 10-20 20-30 30-40 40-50 50-60 60-70 Number of patients 2 5 12 19 9 4 Represent the above data by a frequency polygon.

Question

Philoid · Accepted Answer

Let’s take two classes interval, first at beginning (0-10) and second at the end (70-80) each with frequency zero.

Now we can draw the frequency table with the help of these two classes,

Age in years	Class marks	Frequency
0-10	5	0
10-20	15	2
20-30	25	5
30-40	35	12
40-50	45	19
50-60	55	9
60-70	65	4
70-80	75	0

Now plot the following points on the graph,

A (5,0)

B (15,2)

C (25, 5)

D (35, 12)

E (45, 19)

F (55, 9)

G (65, 4)

H (75,0)

Join the points with line segments

AB, BC, CD, DE, EF, FG, GH, to obtain required frequency polygon. As shown in the figure.

Age in years	10-20	20-30	30-40	40-50	50-60	60-70
Number of patients	2	5	12	19	9	4

In a study of diabetic patients in a village, the following observations were noted.Age in years10-2020-3030-4040-5050-6060-70Number of patients25121994Represent the above data by a frequency polygon.

In a study of diabetic patients in a village, the following observations were noted.

Age in years

10-20

20-30

30-40

40-50

50-60

60-70

Number of patients

2

5

12

19

9

4

Represent the above data by a frequency polygon.