Engineering, 07.11.2019 03:31 jeff2852

Candidates for promotion at a city police department are required to take a written aptitude test. scores on this test are normally distributed with a mean of 230 and a standard deviation of 50. a random sample of 9 test scores was taken. (a)what is the standard error of the sample mean score? (b)what is the probability that the sample mean score is less than 210? (c)what is the probability that the sample mean score is more than 245? (d)suppose that the population standard deviation is, in fact, 30, rather than 50. without doing the calculations, state how this would change your answers to parts (a), (b), and (c). illustrate your conclusions with the appropriate graphs.

Answers: 2

Show answers

Another question on Engineering

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

Condition monitoring is a major component of. (clo4) a)- predictive maintenance. b)-preventive maintenance c)-proactive maintenance d)-reactive maintenance.

Answers: 1

Answer

Engineering, 04.07.2019 18:10

Which from the following instrument is commonly used to detect the high pitch butzing sound in bearings? [clo4] a)-digital ultrasonic meter b)-infrared camera c)-spectroscopic d)-vibrometer

Answers: 2

Answer

Engineering, 04.07.2019 18:20

Describe one experiment in which the glass transition temperature and melting temperature of a totally amorphous thermoplastic material can be determined. show the relevant experimental results in a diagram which should be properly annotated with the two temperatures clearly marked. what is likely to happen to the curve in the diagram if the amorphous polymer is replaced by a thermosetting type?

Answers: 2

Answer

You know the right answer?

Candidates for promotion at a city police department are required to take a written aptitude test. s...

Questions