3.The table below shows masses to the nearest grams of some biological specimen in a laboratory. Draw an ogive for this distribution and use it to determine a) The median b) The quartiles c) The quartile deviation

Solution

Construct a frequency distribution table and draw the ogive

MASS

11-20

21-30

31-40

41-50

51-60

61-70

71-80

81-90

91-100

FREQ

3

17

60

48

27

20

13

8

4
CLASS UPPER CLASS BOUNDARIES f cf
11-20
21-30
31-40
41-50
51-60
61-70
71-80
81-90
91-100