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In a hospital study, it was found that the standard deviation of the sound levels from 20 randomly selected areas designated "casualty doors" was 4.1 dBA and the standard deviation of 24 randomly selected areas designated as "operating theaters" was 7.5 dBA. At α = 0.05, can you substantiate the claim that there is a difference in the standard deviations?
redundant array of inexpensive disks is a technology that uses multiple hard drives to increase the speed of data
1 a sample of 100 elements produced a mean of 48 and a standard deviation of 8. the 99 confidence interval for the
a small business just leased a new computer and color laser printer for three years. the service contract for the
What is the probability of selecting a female or an accounting major? Which rule of addition did you apply?
Write an equation of the plane tangent to the surface S given by x = u^2 + v, y = u + v^2, z = uv, ((u,v)?R^2) at the point P with u = 2, v = 1.
Ben wants to custom order 5 collars for his 5 unique cats. A customer ordered collar is tailor fitted to a pet and comes in a choice of 5 different colors. How many selections of collars for the 5 cats are possible if repetitions of colors are allo..
Calculate the mean salary of the CFOs and base on measures of the center of the data; determine if the CFO salary data are skewed.
based on the table below calculate the relative risk of smokers n 100 to develop lung cancer versus non-smokers n
Decileter and standard deviation of 41 mg/dl. in an srs of 100 men what is the probability that x bar takes a value between 185 and 191 mg/dl?
a research engineer for a tire manufacturer is investigating tire life for a new rubber compound and has built 16 tires
The survey web site received more than 400 responses, with more than 60% favoring continuing the parade, while the telephone response line received more than 120 calls, with more than 90% favoring banning the parade (San Luis Obispo Tribune, March..
Louis Reasoner is having a terrible time doing exercise 2.42. His queens procedure seems to work, but it runs extremely slowly. (Louis never does manage to wait long enough for it to solve even the 6× 6 case.) When Louis asks Eva Lu Ator for help,..
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