Ecocommerce.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
a. How many orders were placed?
b. What is the midpoint of the first class?
c. Draw a histogram.
Steps of drawing a Histogram are enumerated in the solution file.