Hindustan Aeronautics Ltd. supplied aircraft doors to a leading aircraft manufacturer. In 2013, it made a total of 120 deliveries. The following table presents a summary of lead time performance for all the 120 delivery cycles. Based on the information provided in the table, calculate the mean lead time and its coefficient of variation.
|
Lead time (in days)
|
Number of deliveries
|
|
36
|
70
|
|
40
|
30
|
|
33
|
20
|