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In apulse rate research, a simple random sample of 40 men results in a mean of 80 beats per minute, and a standard deviation of 11.3 beats per minute. Based on the sample results, the researcher concludes that the pulse rates of men have a standard deviation greater than 10 beats per minutes. Use a 0.05 significance level to test the researcher's claim. (a) Identify the null hypothesis and alternative hypothesis.
(b) Determine the test statistic. Show all work; writing the correct test statistic, without supporting work, will receive no credit.
(c) Determine the P-value for this test. Show all work; writing the correct P-value, without supporting work, will receive no credit. (d) Is there sufficient evidence to support the researcher's claim? Explain.
What is the state of the steam at the nozzle exit, and what is the rate of total entropy for the process.
an object whose mass is 50 lb attached to a rope wound around a pulley. the radius of the pulley is 3 in. if the mass
An advanced-type supercritical power plant has turbine inlet steam at 7000 psia and 1400 F, double reheat at 1600 psia and 400 psia, both to 1200 F, and condenser at 1 psia. The three turbine sections have polytropic efficiencies of 0.93, 0.91, and 0..
For the following system, G(s) = (s + 50)/ (s + 5) Calculate the magnitude and phase by hand for w = 1, 5, 10, 20, 50, 100 rad/s. Sketch the Bode plot via asymptotes, and compare it to the values from (a).
A large tower is to be supported by a series of steel wires; it is estimated that the load on each wire will be 13,300 N (3000 lbf). Determine the minimum required wire diameter, assuming a factor of safety of 2 and a yield strength of 860 MPa (12..
Calculate the maximum tensile stress τmax and maximum in-plane shear stress τmax at point A on the outer surface of the post along the x-axis due to the load P. Load P acts in a horizontal plane at an angle of 30° from a line which is parallel to ..
the pump is delivering hydraulic oil with a specific gravity of 0.85 at a rate of 20 gallons per minute. the pressure
why use the penalty method for implementing boundary conditions? what are the advantagesdisadvantages of direct versus
the diffuser in a supersonic jet aircraft is a passage designed to reduce the velocity of the air passing through it
the temperature inside a carnot refrigerator is maintained at 5 degrees c by rejecting heat to the surrounings at an
the combustion gases modeled as air enter a turbine at 6atm 1000k and exits at 1atm 500k. determine the isentropic
argon gas flows through a rigid nozzle at steady-state-steady flow. the inlet flow velocity is small. the gas exits the
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