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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.
a gas refrigeration system using air as the working fluid has a pressure ratio of 5. air enters the compressor at 0
using 2n3904 and 2n3906 transistors a vcc12v power source and control with a ttl clock signal sc square wave that stays
Using the Angström-Page method, calculate the average horizontal insolation in Hamburg in May
An experimental centrifugal compressor is fitted with free-vortex guide vanes to reduce the relative air speed at inlet to the impeller
consider a solid rod with diameter d and length l subjected to torsion t and moment m at both ends shown in fig. 1.
a refrigerator with a coefficient of performance of 4.0 transfers heat from a cold region at -20 degrees c to a hot a
propane is to be burned with 15.0 excess air. before entering the furnace the air is preheated from 32f to 575f. at
The steel shaft (Gst = 10.8×103 ksi) is made from two segments: AC has a diameter of 0.5 in L=5in, and CDB has a diameter of 1 in Lcd=8 in Ldb=12 in. If it is fixed at its ends A and B and subjected to a torque of 500 lb-ft,
The surface radiative properties depend on the spe- cific nature of the applied coating. Compute and plot the steady-state temperature as a function of the emissivity for 0.05 s 1, with all other conditions remaining as prescribed. Repeat your calc..
If the pipe flow is air at 20°C and 1 atm and the manometer fluid is Meriam red oil (SG =0.827), estimate the air centerline velocity for the given manometer reading of 16 cm. Assume a smooth-walled tube.
formula as predictor and the second-order Adams-Moulton formula as corrector) to compute an approximation X(0.65) to the solution x(0.65) of the initial-value problem
the tensile strength of a copper sheet increases to 45 ksi by 25 cold work. we want to produce a 0.040 thick sheet of
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