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A consumer magazine is evaluating five brands of trash compactors for their effectiveness in reducing the volume of typical household products that are discarded. In the experiment, each block consists of three bags containing identical mixtures of the kinds of trash described, and each measurement is the volume (cubic feet) to which a given compactor reduced the load it was assigned.
At the 0.025 level, can the magazine conclude the compactors are equally effective in reducing the volume of household trash items? Using the appropriate statistical table, what is the most accurate statement that can be made about the p-value for the test?
when an experiment design has two factors but one factor involves related samples while the other factor involves
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Describe the sampling distribution model of this mean.
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measurements of the diameter of a random sample of 100 ball bearings made by a certain machine during one week showed a
The issue of how much should be spent to solve particular U.S. social problems is a complex matter, and people have diverse and conflicting ideas on these issues.
The mean height of a certain plant is 160 centimeters. Suppose a botanist wants to carry out a hypothesis test to see if the mean height when these plants are treated with a certain chemical differs from 160. What is the null hypothesis and the al..
A random sample of 12 batteries yields X-bar = 34.2 hours and s = 5.9 hours. Give a 95% confidence interval for the average life of a battery.
Consider the seven-component system shown in Figure.- Assume that the time to failure for each component has an exponential distribution.- What is the mean time to failure of the system?
The height of 10 plants is measured in inches and found to be 12, 6, 15, 3, 12, 6, 21, 15, 18 and 12. Verify that Σ(Xi – X) = 0.- For the data in the previous problem, compute the range, variance and standard deviation.
at an emergency room one out of every four urgent patients triaged is followed by another urgent patient while only one
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