Stop-One.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 to under 2 5
2 to under 4 26
4 to under 6 14
6 to under 8 13
8 to under 10 4
Total 62
a. How many orders were studied?
b. What is the midpoint of the fourth class? (Round the final answer to 1 decimal place.)
c. What are the coordinates of the last class for a frequency polygon assuming we draw a frequency polygon using the midpoints? (Round the final x value to 1 decimal place and y value to the whole number.)
x = , y =
f. Interpret the lead times. Most orders take around a day.