Estimate sd for population of waiting times
McDonalds Waiting Times. You want to estimate SD for the population of waiting times at McDonald's drive up windows. You want to be 95% confident that the sample SD is within 20% of SD. Find the minimum sample size. Is this sample size practical?
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A scale is constructed using the 10 kg mass, the 2 kg pan P, and the pulley and cord arrangment. Cord BCA is 2m long. If s = .75 m, determine the mass D in the pan. Neglect the size of the pulley.
The typical amount of sleep per night for undergraduate college students has a bell shaped distribution with a mean of 6 and a standard deviation of 1.60 hours.
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A point charge Q is placed at the origin. A second charge, 2Q, is placed on the x axis at x = -3.0 m. If Q = 50 μC, what is the magnitude of the electrostatic force on a third point charge, -Q, placed on the y axis at y = +4.0 m?
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The standard free energy of activation of a reaction A is 77.7 kJ mol-1 (18.6 kcal mol-1) at 298 K. Reaction B is one million times faster than reaction A at the same temperature.
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