Compare the variance of grading procedures
Two accounting professors decided to compare the variance of their grading procedures. to accomplish this, they each graded the same 10 exams with the following results.What is the H1?
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A certain disease is found in one person in 5000. If a person does have the disease, the test will show a positive result 93% of the time. If a person does not have the disease, the test in 1 out of 500 cases will give a false positive result. (hi
At the exit, P2 = 15 bar, and the velocity is 665 m/s. The mass flow rate is 2 kg/s. Determine the exit area of the nozzle, in m2.
Determine the mass flow rate of the steam, in kg/h, the heat transfer rates for the working fluid passing through the boiler and condenser, each in kW, and the thermal efficiency.
Combustion of 1.96g of a compound containing only hydrogen and carbon produced 6.35g of CO2 and 2.25g of H2O. The molecular weight of the unknown hydrocarbon was determined by mass spectroscopy to be 82.1 g/mol.
The freezing point and boiling points of Bromine (Br2) are -7.2°C and 58.8°C, respectively. Given that the heat of melting is +10.57 kJ/mol .
The duct surface is maintained at 100 degrees C. Assuming fully developed flow through the duct, determine the air outlet temperature. (Evaulate the air pressure properties at 325K to avoid iterations.)
A block of mass m = 5.1 kg is pulled up a θ = 21° incline as in the figure with a force of magnitude F = 34 N. Find the acceleration of the block if the incline is frictionless.
A hurricane is simply a steam engine which draws much of its destructive power from the evaporation and condensation of water. The heat of condensation of water is -2257 kJ/kg.
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