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A sample of 40 CD's from a student's collection showed a mean length of 52.74 minutes with a standard deviation of 13.21 minutes. Construct a 95% confidence interval for the mean. Assume all statistical requirements are met.
Assuming that = 119.5 ng.ml, test the claim that the mean cotinine level of all smokers is equal to 200.0 ng/ml. Use a 0.05 significance level.
A medical school claims that more than 32% of its students plan to go into general practice. It is found that among a random sample of 130 students, 46 of them plan to go into general practice.
Probability based on normal distribution. Suppose among X has a normal distribution, and find the indicated probability.
Data on the financial behavior
Starting with the initial solution derived by the nw corner method identify the cell w/the best cost improvement index and the quantity that can be transferred to that cell.
For a sample of n 4 weeks in which the daily temperature was extremely hot, the weekly average of hit-by-pitch players was M 15.5. Are players more likely to get hit by pitches during hot weeks?
Explain the meaning of the conditional mean of the dependent variable in the population regression function. Illustrate using an example.
A mean of 2000 pounds and a variance of 2500 pounds. Let X be the mean of any sample of 100 ropes selected at random. find the expected value and the standard error of X.
Modify above problem (Problem 8th) so that each hardware vendor now demands seventy-five (75) units. Any units available from the vendors that are not shipped cost nothing.)
How would a decrease of $1 in the x1 coefficient of the objective function affect the optimal values of the decision variables?
List all samples of 3 and compute the mean of each sample. Compute the mean of the distribution of sample means and population mean. compare the two values
find the minimum shape size n needed to estimate mu find the given values of c s and ec0.98 s9.7 e1assume that the
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