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

Show answers

Another question on Business

Business, 21.06.2019 18:30

Which stroke of the four-stroke cycle is shown in the above figure? a. power b. compression c. exhaust d. intake

Answers: 2

Answer

Business, 22.06.2019 02:30

On january 1, 2018, jay company acquired all the outstanding ownership shares of zee company. in assessing zee's acquisition-date fair values, jay concluded that the carrying value of zee's long-term debt (8-year remaining life) was less than its fair value by $21,600. at december 31, 2018, zee company's accounts show interest expense of $14,440 and long-term debt of $380,000. what amounts of interest expense and long-term debt should appear on the december 31, 2018, consolidated financial statements of jay and its subsidiary zee? long-term debt $401,600 $398,900 $401,600 $398,900 interest expense $17,140 $17,140 $11,740 $11,740 a. b. c. d.

Answers: 3

Answer

Business, 22.06.2019 06:40

10. which of the following is true regarding preretirement inflation? a. defined-benefit plans provide more inflation protection than defined-contribution plans. b. because of preretirement inflation, possible investment-related growth is increased for defined-contribution plans. c. all types of benefits are designed to cope with preretirement inflation. d. preretirement inflation is generally reflected in the increase in an employee's compensation level over a working career.

Answers: 3

Answer

Business, 22.06.2019 15:50

Evaluate a real situation between two economic actors; it could be any scenario: two competing businesses, two countries in negotiations, two kids trading baseball cards, you and another person involved in an exchange or anything else. use game theory to analyze the situation and the outcome (or potential outcome). be sure to explain the incentives, benefits and risks each face.

Answers: 1

Answer

You know the right answer?

A design engineer wants to construct a sample mean chart for controlling the service life of a halog...

Questions