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A well-insulated rigid tank of volume 10 ft^3 contains carbon dioxide, initially at 30 psia and 60F. The tank is connected to a large supply line carrying carbon dioxide at 120 psia, 100F. A valve between the line and the tank is opened and gas flows into the tank until the pressure reaches 120 psia, at which time the valve closes. The contents of the tank eventually cool back to 60F. Determine: (a) the temperature in the tank at the time when the valve closes, in F, and (b) the final pressure in the tank, in psia. where F is fahrenheit.
What is the minimal number of days a person must watch to be at least 96.8% sure of seeing one or more hawks migrating?
Suppose that the census indicates the average American earns $36,345.45 per year. You are interested in the whether people who majored in political science earn an amount that is different than the average American.
the frequency distribution below shows the distribution for suspended solid concentrationin ppm in river water of 50
for the following sample8 1 51 5a. find the mean and the standard deviation.b. now change the score of x8 to x18 and
Determine the value of population mean? What is the best evaluate of this value?
1. kane discusses the concentricity of an engine oil seal groove. historically the standard deviation for the
Among 12 adults randomly selected from this area, only 3 reported that their health was excellent. Find the probability that when 12 adults are randomly selected, 3 or fewer are in excellent health.
If an original set of measurements is made in inches and has mean of 36 and variance of 144, what will be the mean, variance, and standard deviation if:
What is the relative frequency of classical CDs with a playing time of X less than 49 minutes? That is, find the relative frequency of the event X
suppose that x1...xn form a random sample from a normal distribution with meanu u pronounced mu and variance1.a write
A standard die has its faces painted different colors. Faces3,4,6 are red, faces 2 and 5 are black and face 1 is white.
a psychologist studied the effect of frequent testing on perception of course material. in one of the professors
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