(a) 
Develop a frequency distribution using classes of 04, 59,
1014, 1519, and 2024. 

Class 
Frequency 
04 

59 

1014 

1519 

2024 

Total 




(b) 
Develop a relative frequency distribution using the classes in
part (a). If required, round your answers to two decimal
places. 

Class

Relative Frequency 
04 

59 

1014 

1519 

2024 

Total 




(c) 
Develop a cumulative frequency distribution using the classes
in part (a). 

Class

Cumulative Frequency 
04 

59 

1014 

1519 

2024 




(d) 
Develop a cumulative relative frequency distribution using the
classes in part (a). If required, round your answers to two decimal
places. 

Class

Cumulative Relative Frequency 
04 

59 

1014 

1519 

2024 




(e) 
What proportion of customers needing an oil change who wait 9
minutes or less? 

% 