Question

A company purchased 1000 identical capacitors for use in short-distance radio transmitters. The company maintained detailed records on the failure pattern of the capacitors with the following results:    

Number of years of operation	1	2	3	4	5	6	7	8	9	10	>10
Number of failures	220	158	121	96	80	68	47	40	35	25	110

According to the data, estimate the life distribution and corresponding parameters. Is it useful to perform “burning-in” action on this product?

Answer 1