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Statement of a problem № m414

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Ecommerce.com, a large Internet retailer, is studying the lead time (elapsed time between when an order is placed and when it is filled) for a sample of recent orders. The lead times are reported in days. Lead Time (days) Frequency 0 up to 5........... 6 5 up to 10.......... 7 10 up to 15.......... 12 15 up to 20........... 8 20 up to 25........... 7 Total............. 40 a. How many orders were studied? b. What is the midpoint of the first class? c. What are the coordinates of the first class for a frequency polygon? d. Draw a histogram. e. Draw a frequency polygon. f. Interpret the lead times using the two charts.




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