Page 16 - Math SL HB Sem 3
P. 16
Statistics And Probability
6.5 : CUMULATIVE FREOUENCY POLYGON(OCIVE)
Two rypes ofogive:
i) 'more than'
iD 'less than'
The upper boundaries are used in the construction ofogive
,
The upper quartilg lower quartile median and kd percentile can be found
from the ogive drawn-
Bxample:
The data shown gives the weights of 120 male footballerc.
Weight ( w kg) Frequency
55<w<60 7
60<w<65 3
65 < w <'lO t2
7O <w <75 l4
75<w<80 t9
80 ( w <85 3']
85 ( w <90 22
90 < w <95 I
95 w < 100 2
-<
100 lw <105 I
(a) Construct a cumulative frequency distribution table-
(b) Represent the data on an ogive
(c) Use your graph to estimate the:
i) median weight
ii) number of men weighing less than 73 kg.
iii) number of men weighing more than 92 kg.
)b
