Page 79 - Math SL HB Sem 3
P. 79
f The ages ofpeople attending a music concert are given in the table below.
ltrl4gt lz T2I
Age 15<x<19 19<x<23 23<x<27 27<x<31 31<.r<35
Frequency t4 26 52 52 l6
Cumulative
t4 40 92 p
Frequency 160
(.) Find p-
[2 marks]
The cumulative frequency diagram is given below.
160
r50
140
130
120 !
ll0
q 100
= o'
90
6.) 80
10 I
E
O 60 il
50 I
40
30
20
l0
0 15 20 25 30 35
Age
(b) Use the diagram to estimate
(i) the 80rr' percentile;
(ii) the interquartile range. [5 murhs]
3
