Mathematics, 25.03.2021 21:10 aek02

The operations manager at a brewery that runs 24 hours per day wants to investigate the amount of production time lost each day (24-hour period) due to equipment failure. Historically, the population mean amount of lost time has been assumed to be 3.4 hours per day. The manager feels that due to aging equipment, the population mean is now greater than 3.4 hours per day. The manager decides to test his claim. Over the next 2 months, the sample of 30 days results in an average amount of lost time 3.92 hours per day with a sample standard deviation 1.4 hours. What would be the conclusions that we can draw for the test described above based on these sample results?

Answers: 1

Show answers

Another question on Mathematics

Mathematics, 21.06.2019 19:00

Stefano accidentally dropped his sunglasses off the edge of a canyon as he was looking down. the height, h(t), in meters (as it relates to sea level), of the sunglasses after t seconds, is shown in the table. during its descent, the pair of sunglasses passed by a climber in the canyon 6 seconds after stefano dropped them. to the nearest meter, what is difference in elevation between stefano and the climber? 166 meters 176 meters 230 meters 240 meters its b.176 i took the test 166 is wrong and 176 is correct

Answers: 1

Answer

Mathematics, 21.06.2019 19:50

Prove (a) cosh2(x) − sinh2(x) = 1 and (b) 1 − tanh 2(x) = sech 2(x). solution (a) cosh2(x) − sinh2(x) = ex + e−x 2 2 − 2 = e2x + 2 + e−2x 4 − = 4 = . (b) we start with the identity proved in part (a): cosh2(x) − sinh2(x) = 1. if we divide both sides by cosh2(x), we get 1 − sinh2(x) cosh2(x) = 1 or 1 − tanh 2(x) = .

Answers: 3

Answer

Mathematics, 21.06.2019 20:00

Which of the following is an equation of a line parallel to the equation y=4x+1?

Answers: 1

Answer

Mathematics, 21.06.2019 23:00

Ithink i know it but i want to be sure so can you me out ?

Answers: 1

Answer

You know the right answer?

The operations manager at a brewery that runs 24 hours per day wants to investigate the amount of pr...