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Analyze whether the factors of totwrk, educ, and age are enough factors to explain the variation in sleep. Explain which additional factors should be explored in order to explain the variation in sl
A delivers the document with probability 0.9, Service B with probability 0.9 and Service C with probability 0.8. What is the probability that at least one copy of the document will be delivered on t
Based on long experience, an airline found that about 9% of the people making reservations on a flight from Miami to Denver. What is the probability that a person holding a reservation will show up fo
Construct an appropriate graphical display for the call pickup times. Then calculate numerical summary statistics. Write a few sentences describing the distribution of response times.
Write up the summary of his results and his conclusion regarding his hypothesis. What observations would you make from the findings of these two studies?
Construct the 90 percent confidence interval for the proportion of checking account customers who have a Visa card with the bank.
The manager proposes to test one case where a a consumer was placed on hold. Is this a good testing strategy? If not what would be a better testing strategy?
If a Normal model is useful for describing slalom times, approximately how many of the other 35 skiers finishing the event would you expect skied the slalom faster than Jean-Baptiste?
Find the equation of the regression line. What is the predicted value when x=4. The data for a random sample of six paired observations are shown in the table above.
Have a uniform distribution over the interval ( - ~, ~), compute approximately the probability that the sum of the integers is within two units of the true sum.
Two-thirds of U.S. households purchased ground coffee. What proportion of the households spent between $40.00 and $50.00?
Explain these results to a person who understands the t test for a single sample but knows nothing about the t test for independent means.
Suppose that X1,..,Xn form a random sample from a distribution for which the pdf f(x|theta) is as follows: Also suppose that the value of theta is unknown (theta >0). Find the M.L.E of theta.
Suppose that X1,...,Xn form a random sample from an exponential distribution for which the value of the parameter B(beta) is unknown. Determine the M.L.E. of the median of the distribution.
Variance are unknown. Find the MLE of the 0.95 quantile of the distribution, that is, of the point "theta" such that Pr(X < "theta") = 0.95.
Let x be the number who donate time and energy to community projects. Find the probability that more than five of 15 donate time and energy to community projects.
Mr. Connor randomly chooses one student to collect yesterday's work. What is the probability that he selects a male, given that he chooses randomly from only the sophomores?
In addition please draw the sampling distribution model associated with this test and label your statistic, the null, the critical value, and three standard errors on each side, and shade the critic
National Muffler Company claims it will change your muffler in less than 30 minutes. Develop a box plot for the time to change a muffler.
What is the probability of randomly selecting a member of the traveling public and finding out that he says that flight selection is not influenced by perceptions of airline safety and he wants to k
What is the probability that a randomly selected company uses either faculty references or college transcript as part of the hiring process?
Unknown to you, four of the phones are faulty and do not work. Find the probability that one of the two phones is faulty.
Is there a difference between the percent of people with normal or borderline diastolic blood pressure (89 or less) who have heart disease, and the percent of people with high diastolic blood pressu
we should not decide to lower prices based on this research." Comment on the executive's conclusion. What type of inference is being made? Will the decision not to lower prices be a good one.
To process passengers (check in, take luggage, etc) take an average of 6 minutes each. There are 6 airport staffers processing passengers. How long is the average wait for each passenger?