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A book shelf manufacturer claims that their largest bookshelves can withstand an average of 245 kilograms of books, with a standard deviation of about 26 kilograms. A sample of 33 bookshelves is selected and the weight they could withstand was measured. What is the probability that the value of the sample mean is less than 239.2 or greater than 250.8? What is the probability that the value of the sample mean is less than 237.6?
Why is statistical significance not necessarily of practical important difference to a business decision? Give an example and explain.
in the movie casablanca rick played by humpy bogart helped a married couple by allowing the husband to win at the
What is the direction of the test? (TWO-TAILED or UPPER-TAILED or LOWER-TAILED)
The conditions that make for happy people have been researched by psychologists for a long time. The data that follow are based on a review of the literature.
How tall? The heights of young men follow a Normal distribution with mean 69.3 inches and standard deviation 2.8 inches. The heights of young women follow.
MSA Computer Corporation manufactures two models of minicomputers, the Alpha 4 and Beta 5. The firm employs 5 technicians, working 160 hours each per month, on its assembly line.
given the returns and probabilities for the three possible states listed here calculate the covariance between the
Solve the initial value problem y' = 2y + 3, y(0) = 2. The population p(t) of the South American Agouti satisfied the population law dp/dt = 0.05p - 450, where the factor 0.05 reflects the birth rate and the -450 is a constant harvest rate due to ..
(a) State the appropriate hypotheses in this case, defining any parameters you use. (b) Somehow the p-value did not get printed. Use the Vassar applet to compute the p-value. (c) Carefully state your conclusions based on these data. Use a level of si..
Consider testing Upper H0= : H0: µ=20 against Ha: µ
Continue your work from the previous exercise. The interquartile range IQR is the distance between the first and third quartiles of a distribution.
Suppose X and Y are independen- Find the joint PDF of R and Θ. - Show that the marginal PDF of follows a Rician distribution.
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