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One common approach to measuring a company's quality is through the use of customer satisfaction surveys. Suppose in a random sample, Seitz's customers are asked whether the plastic tractor produced by Seitz has outstanding quality (Yes or No). Assume Seitz produces these tractors at two different plant locations and that the tractor customers can be divided according to where their tractors were manufactured. Suppose a random sample of 45 customers who bought tractors made at plant 1 results in 18 saying the tractors have excellent quality and a random sample of 51 customers who bought tractors made at plant 2 results in 12 saying the tractors have excellent quality. Use a confidence interval to express the estimated difference in population proportions of excellent ratings between the two groups of customers. Does it seem to matter which plant produces the tractors in terms of the quality rating received from customers? What would you report from these data?
What are the corresponding values of T1 and T2 for q"s = 106 W/m2? If q"s were increased to 1.5 X 106 W/m2, could the foregoing results be extrapolated to infer the corresponding values of !l.Te, T1, and T2?
To reduce costs and the environmental impact of commuting, your company decides to close a number of offices and to provide support for staff to work from home.
A machine component of square cross- section is subjected to a direct tensile of 20 kn and a shear load of 10 kN. Considering the maximum normal stress theory and distortion energy theory of failure calculate the dimension of the component. Take fact..
the particle a is mounted on a light rod pivoted at o and therefore is constrained to move in a circular arc of radius
a turbine is operated with an enthalpy at entrance of 1340 btulbm and an exit enthalpy of 1285 btulbm. if the entrance
a diffuser shown in fig. p6.36 has air entering at 100 kpa 300 k with a velocity of 200 ms. the inlet cross-sectional
Consider a car having a frontal are of 2.0m^2 with a drag coefficient of 0.35. The mass of the car is 1250kg and the rolling resistance is 1.0% of the weight of the car. At what speed does the aerodynamic drag first exceed the rolling resistance.
A block is made of a material with a specific gravity of 1.3. If the block has a volume of 0.52 m3, what is the mass of the block?
an aluminum pin fin has a diameter of 4 mm and a length of 20 mm. calculate the heat dissipated when the base
A carnot heat engine receives heat from a reservoir at 925oC at a rate of 730 kJ/min and rejects the waste heat to the ambient air at 24oC. The entire work output of the heat engine is used to drive a refrigerator that removes heat from the refrigera..
the environment in a certain area is 15 degrees c. plot the maximum efficiency of a nuclear power plant as a function
a thermometer is initially at a temperature of 70degf and is suddenly placed in a liquid which is maintained at
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