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Air enters a compressor with a pressure of 14.7 psia, a temperature of 70 degreeF, and a volumetric flow rate of 40 ft^3/s. Air exits the compressor at 50 psia and 190 degreeF. Heat transfer from the compressor to its surroundings occurs at a rate of 20.5 Btu per lb of air flowing. Determine the compressor power, in hp, for steady-state operation.
The length of time to do a complete full service oil change at Speedy-Lube is normally distributed with a mean of 15.8 minutes and a standard deviation of 2.2 minutes
Find the minimum sample size needed, using a prior study that found that 19% of computers needed repairs or had problems by the time the product was three years old.
A recent survey by the insurance company showed the following probabilities for the number of bedrooms in each insured home. Find the standard deviation for the distribution.
Construct a 95 percent confidence interval for the true mean.
In a random sample of 200 person of a town 120 are found to the tea drinker.In a random sample of 500 person of another town 240 are found to be tea drinker.Is the proprtion of tea drinker in the two towns are equal? use .001 level significance.
Standard deviations for first- and second-time and confidence interval
the mean is always the best measure of central tendency to use.truefalseif you use a simple random sample then your
explain how measure of central tendency and measure of dispersion are complementary to each other to describe the
In a regression analysis, the sum of the squared deviations between y and y-bar is SST = 200.0. If the sum of the squared deviations about the regression line is SSE + 40.0, what is the coefficient of determination?
q1. if we have a sample size of 100 and the estimate of the population proportion is 0.10 the mean of the sampling
the probability that a person will have 01 or2 dental checkups per year is 0.3 0.6 and 0.1 respectively. if seven
question in a survey conducted by ipsos-reid in august 2009 63 percent of the 1000 canadians surveyed said that they
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