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Homework answers / question archive / Assignment: Ecommerce
Assignment:
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? (Round your answer to 1 decimal place.) 
c. 
What are the coordinates of the first class for a frequency polygon assuming we draw a frequency polygon using the midpoints? (Round your answer to 1 decimal place.) 
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