Engineering, 06.08.2021 17:50 kaffolter25

An engineer is comparing voltages for two types of batteries (K and Q) using a sample of 38 type K batteries and a sample of 31 type Q batteries. The type K batteries have a mean voltage of 9.31, and the population standard deviation is known to be 0.674. The type Q batteries have a mean voltage of 9.69, and the population standard deviation is known to be 0.631. Conduct a hypothesis test for the conjecture that the mean voltage for these two types of batteries is different. Lew, be the true mean voltage for type K batteries and be the true mean voltage for type Q batteries. Use a 0.01 level of significance. Step 2 of 5: Compute the value of the test statistic. Round your answer to two decimal places Answer/How to Enter) 2 Points Keypad ,Tables

Answers: 2

Show answers

Another question on Engineering

Engineering, 03.07.2019 15:10

If you were designing a bumper for a car, would you prefer it to exhibit elastic or plastic deformation? why? consider the functions of a bumper in both a minor "fender-bender" and a major collision.

Answers: 1

Answer

Engineering, 03.07.2019 15:10

Two flowing streams of argon gas are adiabatically mixed to form a single flow/stream. one stream is 1.5 kg/s at 400 kpa and 200 c while the second stream is 2kg/s at 500 kpa and 100 ? . it is stated that the exit state of the mixed single flow of argon gas is 150 c and 300 kpa. assuming there is no work output or input during the mixing process, does this process violate either the first or the second law or both? explain and state all your assumptions.

Answers: 1

Answer

Engineering, 04.07.2019 18:10

Apipe with an outside diameter of 15 cm is exposed to an ambient air and surrounding temperature of -20°c. the pipe has an outer surface temperature of 65°c and an emissivity of 0.85. if the rate of heat loss from the pipe surface is 0.95 kw per meter of length, the external convective heat transfer coefficient (h) is: (a) 12.5 w/m"k (b) 18.6 w/mk (c) 23.7 w/mk (d) 27.9 w/mk (e) 33.5 w/mk

Answers: 1

Answer

Engineering, 04.07.2019 18:10

Which of the following refers to refers to how well the control system responds to sudden changes in the system. a)-transient regulation b)- distributed regulation c)-constant regulation d)-steady-state regulation

Answers: 1

Answer

You know the right answer?

An engineer is comparing voltages for two types of batteries (K and Q) using a sample of 38 type K b...

Questions