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A new question is answered every 9 seconds, a large Internet retailer, is studying the lead

This answer was rated:, 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. With calculations.

1.     How many orders were studied?
2.     Draw a histogram

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

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