Business, 18.10.2019 00:30, SmokeyRN

Adesign 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:
what is the standard deviation of the sampling distribution of sample means for whenever service life is in control?
select one:
a. 10 hours
b. 6.67 hours
c. 11.55 hours
d. 5 hours
e. 20 hours

Answers: 2

Show answers

Other questions on the subject: Business

Business, 21.06.2019 14:30, borgesalfonso12

)murphy was consuming 100 units of x and 50 units of y . the price of x rose from 2 to 3. the price of y remained at 4. (a) how much would murphy’s income have to rise so that he can still exactly afford 100 units of x and 50 units of y ? g

Answers: 1

continue

Business, 21.06.2019 23:30, trinitieu66

Which alternative accounting method allows farmers to record expenses and incomes in the year in which they sell their yield? gaap allows for the method, which permits farmers to subtract the expenses of producing the crop in the year in which they sell the yield and earn the revenue.

Answers: 3

continue

Business, 22.06.2019 11:00, sbelgirl2000

Consider an economy where government expenditures are 10 and total tax revenues are 10. the supply of labor is fixed at 125 and the supply of capital is fixed at 8. the economy is described by the following equations. y k to the power of 1 divided by 3 end exponent l to the power of 2 divided by 3 end exponent c 2.5 + 0.75 ( y - t ) i 10 - 0.5 r the level of private savings is

Answers: 1

continue

Business, 22.06.2019 19:30, jaybeast40

Oz makes lion food out of giraffe and gazelle meat. giraffe meat has 18 grams of protein and 36 grams of fat per pound, while gazelle meat has 36 grams of protein and 18 grams of fat per pound. a batch of lion food must contain at least "46,800" grams of protein and 70,200 grams of fat. giraffe meat costs $1/pound and gazelle meat costs $2/pound. how many pounds of each should go into each batch of lion food in order to minimize costs? hint [see example 2.]

Answers: 1

continue

Do you know the correct answer?

Adesign engineer wants to construct a sample mean chart for controlling the service life of a haloge...