The owner of an automobile repair shop studied the waiting times for customers who arrive at the shop for an oil change. The following data with waiting times in minutes were collected over a one-month period. 3 4 10 21 4 5 3 23 10 11 9 16 6 14 6 9 2 22 16 7 (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 0-4 5-9 10-14 15-19 20-24 (e) What proportion of customers needing an oil change who wait 9 minutes or less? %
The owner of an automobile repair shop studied the waiting times for customers who arrive at the shop for an oil change. The following data with waiting times in minutes were collected over a one-month period.
3 4 10 21
4 5 3 23
10 11 9 16
6 14 6 9
2 22 16 7
(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
0-4
5-9
10-14
15-19
20-24
(e) What proportion of customers needing an oil change who wait 9 minutes or less?
%
here we have to find cumulative relative frequency and proportion of customers needing an oil change who wait 9 minutes or less
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