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...

1.       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 Times (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