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Students at certain colleges are measured concerning their use of laptop computers. At State College, 15% of the students prefer MACs while at State Tech, only 8% of the students prefer MACs. If a sample of 100 students is taken at State College, and an independent sample of 110 students is taken at State Tech, construct the ninety-five percent confidence interval for the difference in the portion of the populations who prefer MACs.
The cheetahs' coach believes that the Rockets' times are normally distributed as well. Construct a 95% confidence interval the Coach to compare the two teams' sprint units.
a bank manager wishes to provide prompt service for customers at the banks drive-up window. the bank currently can
A sample of 900 computer chips revealed that 76% of the chips do not fail in the first 1000 hours of their use. The company's promotional literature states that 78% of the chips do not fail in the first 1000 hours of their use.
a facilities manager at a university reads in a research report that the mean amount of time spent in the shower by an
(a) Prepare to do this by using the mixed congruential method to generate a sequence of five random integer numbers between 0 and 31 such that
Explain why this does not necessarily prove that the special course caused the scores to go up.- Propose a design for an experiment that could test the effectiveness of the tutorial course.
The retail price of 12-pack soda can be characterized as having a normal distribution with a mean of 3.00 dollars and a standard deviation of 0.25. Below what price do you find 30 percent of all 12-packs?
Name the test that is the nonparametric relative of an independent-samples t test. Name the relative of a paired-samples t test.
the president of a company that manufactures air conditioners is considering switching his supplier of condensers.
There are two major tests of readiness for college, the ACT and the SAT. ACT scores are reported on a scale from 1 to 36. The distribution of ACT scores for more than 1 million students in a recent high school graduating class was roughly normal with..
Suppose that we modify the M/M/2 queueing system as follows: when a server is free, he assists (if needed) the other server, so that the service time, S, has an exponential distribution with parameter 2μ.
The population of incomes in a particular community is thought to be highly right-skewed with a mean equal to $36,789 and a standard deviation equal to $2,490.
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