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A design effect for the mean of a variable = 1.144 will the variance be under clustering be smaller or bigger than under a simple random sample
Given the calculated design effect, will the standard errors under clustering be smaller or bigger under simple random sample design?
A doctorhas developed an experimental drug for toe-nail fungus. He needs to test it out on some people to make sure it works. He has a list of 2000 people who could be potential subjects in his study. 1120 of these potential subjects have toe ..
A company is interested in knowing which are the potential sales next year if you use $ 20,000 in advertising expenses. The company uses the information from previous years to make its sales forecast.
a store is running a promotion during which customers have two options for payment. option one is to pay 90 of the
if you are using the method of least squares for fitting trends in an annual time series containing 25 consecutive
Healthcare issues are receiving much attention in both academic and political arenas. Compute the arithmetic mean age of the uninsured senior citizens to the nearest hundredth of a year.
The famous YS Chang restaurant is open 24 hours a day. Waiters and busboys report for duty at 3am, 7am, 11am, 3pm, 7pm, or 11pm, and each works an 8 hour shift. The following table shows the minimum number of workers needed during the six periods ..
the cost of a college education has increased at a much faster rate than costs in general over the past twenty years.
airlines sometimes overbook ights. suppose that for a plane with 50 seats 55 passengers have tickets. dene the random
What would you suggest to be the appropriate statistic tests to use and why ? Any suggestions on stating the hypothesis in a more professional manner?
There are four levels of measurement, two are numeric and two are attribute data. This first time around, try to identify if a question produces a number or a text number.
Comment on the graphical comparison between the estimates obtained with the automatically selected spans in Problem 8 and the estimate obtained from Friedman's smoother using the cross-validation span in Problem 1.
a simple random sample of 50 items from a population with 6 resulted in a sample mean of 32. provide a 90 confidence
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