Answer Happy

6. A total of 10,000 people visited the shopping mall
over 12 hours:
Time (hours)        People
0                                
0
2                              
350
4                            
1100
6                             
2400
8                             
6500
10                            
8850
12                          
10,000
a) Estimate the 30th percentile (when 30% of the visitors had
arrived). (3)
b) Estimate what percentile of visitors had arrived after 11 hours.
(5)