Minimum time needed for the elevator to rise
A 15KW electric motor provides power for an elevator of a building. What is the minimum time needed for the elevator to rise 30 meters to the sixth floor when its total mass, when loaded, is 900Kg?
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A sample of n = 16 individuals is selected from a normal population with a mean of µ = 48 and a standard deviation of s = 12. After receiving a treatment, the sample mean is found to be M = 52. Compute Cohen's d to evaluate the size
An insulating solid sphere of radius a has a uniform volume charge density and carries a total positive charge Q. Calculate the electric field at a) a point outside the surface, and b) at a point inside the sphere.
Explain how the power of a hypothesis test is influenced by each of the following. Assume that all other factors are held constant. Increasing the alpha level from .01 to .05. Changing from a one-tailed test to a two-tailed test.
What is the difference between Discrete random variable and continuous random variable?
Suppose you hear an "old-timer" say, "Why, in my day, kids were much more respectful and didn't cause as much trouble as they do nowadays!" Formulate a hypothesis related to this statement that you could test. How would you test it?
If a car in this city needs major repair during its first year of purchase, what is the probability that it is made by manufacturer A?
A particle is confined to a three-dimensional box that has sides L1, L2 = 2L1, and L3 = 3L1. Give wave function for the fifth excited state. (There are only five states that have energy levels below the energy level of the fifth excited state.)
A clinical psychologist administered a standard test of symptoms of three different behavioral disorders to a new patient at a mental health clinic. On the scale that measures Disorder F (in the general public, M = 60, SD = 8), the person's score
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