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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.
Determine the reactions on the beam at its support A in terms of the compression CA, shear VA, and bending moment MA.
How long in time must the pressure pulse be to allow for a detonation to occur and what is the minimum distance that the shock must traverse to allow for a detonation to occur?
A certain soil has a dry volumetric weight of 15.7 kN/m3, and a saturated volumetric weight of 21.4 kN/m3. The phreatic level is at 2.5 m below the soil surface, and the capillary rise is 1.3 m. Calculate the vertical effective stress at a depth o..
one car p heading north begins at rest and accelerates with acceleration a. the other car q begins with a velocity of
suppose that the mass in a mass-spring-dashpot system with m10 c9 and k2 is set in motion with x00 and x05 a find the
If the exchanger were operated in counterflow with the same overall coefficient and inlet temperatures, what would be the reduction in the required length relative to the value found in part (a)?
the piston has no mass and no friction. there is 2 kg of water and the initial temp is 99.61 c and initial volume is
SO3 has many uses including the production of sulfuric acid (H2SO4). A gas stream having the (molar) composition shown in the figure below is to be passed through a two-stage converter. The fractional conversion of SO2 to SO3 (per single pass) in the..
An ideal gas is confined to one side of a rigid, insulated container divided into equal volumes by a partition. The other side is initially evacuated. The following data are known for initial state of the gas: p1 = 300 kPa, T1 = 380K and V1 = 0.025 m..
solar turbines mercury 50 gas-turbine power generatorinlet air
A rigid bar of mass m and length L is released from rest in the horizontal position. What is the rod's angular velocity when it has rotated through 90°?
Estimate the shear and moment at each end of beams IJ and JK - analyzing the second-floor beams and the attached columns
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