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Suppose that the specifications on the diameter of a rotor shaft are 0.25±0.002. If the diameters are distributed normally with mean μ=0.251 and standard deviation σ=0.001, what percentage of them are within specifications?
A local health care company wants to estimate the mean weekly elder day care cost. A sample of 10 facilities shows a mean of $250 per week with a standard deviation of $25. What is the 90 percent confidence interval for the population mean?
Consider the linear system x' = Ax, where A is a n x n real matrix. If x = x(t) is a solution of the linear system, we define:
Set up a 99% confidence interval estimate of the true population mean amount of glue contained in a 2-litre can. On the basis of your results, do you think that the quality control analyst has a right to complain to the manufacturer?
Assume the probability that a person has the desease is 0.08 for all people, independently of each other. Compute the total expected number of tests necessary.
An Auditor of a small bsuiness has sampled 50 of 700 accounts. The sample mean total receivables is $435, and the sample standard deviation is $86. Find a 95% confidence interval for the total amount of receivables.
X has a normal distribution with a mean of 80.0 and a standard deviation of 3.5. Find the following probabilities.
Random variables x and y have the joint density function. Find the value of the constant a
Find the probability that he will answer all 10 questions correctly.
The hypotheses tested by the one-way ANOVA F test - Evaluate the P-value of the ANOVA F test
How does the percentage likelihood of a successful negotiation change over the course of time? Use the statistical data to inform the plan and the course of action the department will take in this hostage situation.
In your opinion does one do a better job or representing the proportion of the area under the standard curve?
It is suspected that high pollution levels (measured by number of particulates found in the air) increase the levels of asthma attacks. A researcher collects data on50 people who experienced an asthma attack during the course of one year.
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