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A simple random sample of size 100 is taken from a population. The population variance in unknown. The distribution of the standardised sample mean is a t-distribution. What are the degrees of freedom for this t-distribution?
A population consists of the following four values: 8, 10, 12, and 16. From this population, there are 6 different samples of size 2. The means of the 6 samples of size 2 are: 9, 10, 12, 11, 13, and 14. Compute the mean of the distribution of the ..
What is the probability that a simple random sample of auto insurance policies will have a sample mean within $25 of the population mean for each of the following sample sizes: 30, 50, 100, and 400.
If we want to estimate the populations mean travel-to-work time San Francisco residents with a margin of error of 1 minute, what sample size should be used? Assume 95 percent confidence.
What sample size would be needed for an error of ± 1.5 with 98 percent confidence? (Data are from a project by MBA student Wendy Blomquist.)
Suppose you were preparing two-way tables of percentages for the following pairs of variables. How would you run the percentages?
In your workplace? Elsewhere in the business sector? In your education (during your UOPX degree program)? In politics? Explain your response.
let x have the cumulative distribution function fx 1-e-x-1 x gt -1. find micro of x by using the mgf of
in the june 2007 issue consumer reports examined top laoding and front loading washing machines testing samples of
If the basket ball player is a 74% free throw shooter, then, on average, how many free throws will he or she make in a game with eight free throw attempts?
Determine whether such subjects do better, on the average, than expected by just guessing and perform the statistical test
Approval rating of 48% within a margin of error of 3%. Construct a confidence interval for the population proportion (p) of adults who approve of the candidate.
The following table is based on information taken from the Medical Practice Characteristics section of the Statistical Abstract of the United States
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