The owner of an automobile repair shop studied the waiting times for customers who arrive at the shop for an oil change.

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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. 9 11 3 12 11 4 3 4 24 13 22 5 18 6 ON 12 23 15 (a) Develop a frequency distribution using classes of 0-4, 5-9, 10-14, 15-19, and 20-24 Class Frequency 0.4 5.9 10-14 15:19 20-24 Total (b) Develop a relative frequency distribution using the classes in part af required, round your answers to two decimal aces

(b) Develop a relative frequency distribution using the dasses in part (a). If required, round your answers to two decimal places. Relative Frequency Class 0-4 5.9 10-14 15-19 20-24 Total (c) Develop a cumulative frequency distribution using the dasses in part (a). Cumulative Class Frequency 0-4 5-9 10-14 15-19 20:24 (a) Develop a cumulative relative frequency distribution using the dasses in part). If required, round your answers to two decimal places Cumulative

Class Frequency 0.4 5-9 10-14 15-19 20-24 (d) Develop a cumulative relative frequency distribution using the dasses in part (ə). If required, round your answers to two decimal places. Cumulative Relative Class Frequency 0.4 5-9 10-14 15-19 20-24 (e) What proportion of customers need an oll change who wait 9 minutes or loss? 9