Business, 11.02.2021 20:50, MarishaTucker
A design engineer wants to construct a sample mean chart for controlling the service life of a halogen headlamp his company produces. He knows from numerous previous samples that this service life is normally distributed with a mean of 500 hours and a standard deviation of 20 hours. On three recent production batches, he tested service life on random samples of four headlamps, with these results: Sample SERVICE LIFE 49 525 470 500 515 480 505 500 505 513 460 470
1. What is the sample mean service life for sample 2?
A) 460 hours
B) 495 hours
C) 515 hours
D) 525 hours
2. What is the mean of the sampling distribution of sample means for whenever service life is in control?
A) 250 hours
B) 470 hours
C) 495 hours
D) 500 hours
E) 515 hours
3. If he uses upper and lower control limits of 520 and 480 hours, on what sample(s) (if any) does service life appear to be out of control?
A) sample 1
B) sample2
C) sample 3
D) both samples 2 and 3
E) all samples are in control
Answers: 1
= 515
= 500
= 470
= 495
Other questions on the subject: Business
Business, 22.06.2019 13:10, Hannahdavy5434
Thomas kratzer is the purchasing manager for the headquarters of a large insurance company chain with a central inventory operation. thomas's fastest-moving inventory item has a demand of 6,000 units per year. the cost of each unit is $100, and the inventory carrying cost is $10 per unit per year. the average ordering cost is $30 per order. it takes about 5 days for an order to arrive, and the demand for 1 week is 120 units. (this is a corporate operation, and the are 250 working days per year.)a) what is the eoq? b) what is the average inventory if the eoq is used? c) what is the optimal number of orders per year? d) what is the optimal number of days in between any two orders? e) what is the annual cost of ordering and holding inventory? f) what is the total annual inventory cost, including cost of the 6,000 units?
Answers: 3
Business, 22.06.2019 17:00, ocean11618
Oliver is the vice president of production at his company and has been managing the launch of new software systems. he worked with a team of individuals who were tasked to create awareness about a specific product and also to approach potential purchasers of the product. which department managers were part of oliver’s team?
Answers: 3
Business, 22.06.2019 19:30, kraigstlistt
Each row in a database is a set of unique information called a(n) table. record. object. field.
Answers: 3
Business, 22.06.2019 23:30, SmolBeanPotato
Shelby bought her dream car, a 1966 red convertible mustang, with a loan from her credit union. if shelby paid 5.1% and the bank earned a real rate of return of 3.5%, what was the inflation rate over the life of the loan?
Answers: 2
Do you know the correct answer?
A design engineer wants to construct a sample mean chart for controlling the service life of a halog...
Questions in other subjects:
Spanish, 16.07.2019 00:30
History, 16.07.2019 00:30
Chemistry, 16.07.2019 00:30
