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Question: The accompanying table shows annual return data from 2001- 2009 for Vanguard's Balanced Index and European Stock Index mutual funds. The data can also be accessed from the text website, labeled Vanguard Balanced and European Funds.
a. Set up the hypotheses to test whether mean returns of the two funds differ.
b. What is the value of the test statistic and its associated p -value given unequal population standard deviations?
c. At the 5% significance level, what is the conclusion?
Based on the information in part (a), what decision should the director make about the books used for the courses if the goal is to keep the cost below $300?
Create a scatter plot for those data. Based on scatter plot, how would you explain relationship between the two variable.
Find out 90% confidence interval for the population average µ of the percentage of hospitals providing at least some charity care.
probability based on binomial distribution.1 suppose that pe 0.76 pf 0.45 and pe and f 0.32. what is p e or f?2
Two masked robbers try to rob a crowded bank during the lunch hour but the teller presses a button that sets off an alarm and locks the front door.
Explain which parts of the sample space are being double counted on both sides of this equation and which parts are being counted once.
In this problem we want to run a test of goodness of fit to check whether the coats in the consignment follow the indicated probabilities.
Set up a Metropolis-Hastings algorithm with the likelihood as target using an exponential candidate for α and a Laplace (double-exponential) candidate for β.
As a member of the panel making the decision, you must evaluate the seriousness of the two types of error. Explain which type you think is more serious.
question 1 the financial aid office of a university asks a sample of students about their employment and earnings. the
Comment on the relative merits of using a 0.95 confidence interval for addressing the effectiveness of the antipollution device in the previous exercise.
1.as the degrees of freedom become larger the difference between the t and z distributions becomesa.narrowerb.stays the
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