Population proportion to within a sampling error
If you want to be 95% confident of estimating the population proportion to within a sampling error of (plus or minus 0.05 ) and there is historical evidence that the population proportion is approximately 0.37, what sample size is needed?
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Water at 60 F is flowing in laminar flow between two stationary parallel plates spaced 2 inches apart. The centerline velocity (umax) is 10 in/s. Assume the velocity profile to be parabolic i.e.,:
A circular loop (area = 0.2 m^2) turns in a uniform magnetic field with B=0.13 T. At an instant when the angle between the magnetic field and the normal to the plane of the loop is (pi) rads and is decreasing at the rate of 0.50 rad/s, what is the
If you want to be 95% confident of estimating the population mean to within a sampling error of (Plus or minus 6) and the standard deviation is assumed to be 18, what sample size is required?
A continuous gravity decanter is to separate chloro-benzene with a density of 1109 kg/m^3 from an aqueous wash liquid having a density of 1020 kg/m^3. If the total depth in the separator is 1m and the interface is to be 0.6 m from the vessel floor
A juniper wood plank measuring 8 ft by 0.6 ft by 0.1 ft is totally immersed in water. What is the net force acting on the plank?
What is the effect of the propane addition on the mole fractions of propane in the vapor and liquid phases? Explain your answer.
Steam at 320oC flows in a stainless steel pipe (k = 15W/m. oC) whose inner and out diameters are 5 cm and 5.5 cm, respectively. The pine is covered with 3-cm-thick glass wool insulation (k = 0.038W/m. oC).
A viewing window in the Atlanta aquarium is 69 inches wide and 41 inches high. If the average pressure of the water inside the tank is 17.3 psi, what is the outward force on the window?
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