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Sports that involve a significant amount of running, jumping, or hopping put participants at risk for Achilles tendinopathy (AT), an inflammation and thickening of the Achilles tendon. A study in The American Journal of Sports Medicine looked at the diameter (in mm) of the affected and nonaffected tendons for patients who participated in these types of sports activities.Suppose that the Achilles tendon diameters in the general population have a mean of 5.97 millimeters (mm) with a standard deviation of 1.95 mm.
Test an appropriate hypothesis and state your conclusion. Be sure the appropriate assumptions and conditions are satisfied before you proceed.
We considered the two examples of the Drunkard's Walk corresponding to the cases n = 4 and n = 5 blocks (see Example 11.13). Verify that in these two examples the expected time to absorption, starting at x, is equal to x(n - x).
Why is the standard deviation so large?- If it writes only two of these policies, what are the mean and standard deviation of the annual profit?
construct a confidence interval of the population proportion at the given level of confidence. x105 n150 95
The standard deviation of the difference was 5 mmHg. What was the power of the test to find a mean difference of 2.5 mmHg at a = 0.05 (two-sided)?
Say you know that 20 of the 70 people in the party are from out of town, but you don't know which 20 people.
Find the constant . - Find the marginal PDF for a subset of two of the three random variables. - Find the marginal PDF for one of the three random variables.
An article in BusinessWeek discusses the salvage value of bankrupt hedge funds compared with the salvage value of bankrupt consumer lenders.7 Suppose the following data are the value a shareholder can salvage, in cents per invested dollar, for ran..
What is the 95% confidence interval for the proportion of all delinquent customer accounts at this manufacturing company?
Why do we do power calculations with single sample z test? A) Because we can use Z area tables to calculate the power. B) Because comparing a sample mean against a population mean is very powerful
What is the root mean square speed of a gold atom (atomic mass number 197) vibrating around its equilibrium position in a gold wire at room temperature?
Assuming that this procedure yields a binomial distribution, find the mean and the standard deviation for the number of households in this sample who have cable TV.
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