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Suppose you take the average of a large data set and then obtain a sample by throwing away all but 10%, would you expect the sample average to have the same value as population average?
Polls showed the two main candidates in the 2004 presidential election were nearly tied on the day before the election. To predict the winner a newspaper would like to have a poll that has margin of error less than 1%. Roughly how large a sample w..
1.Interested in learning more about its fans, the marketing office of the Arena Football League (AFL) conducted a survey at one of its games.
What are the independent variables and their levels? What is the dependent variable? State all null hypotheses associated with independent variables and their interaction? Also suggest alternate hypotheses
Some studies show that people who think they are intoxicated will show signs of intoxication, even if they did not consume alcohol.
Jan finished culinary school and wants to start her own pastry business. She has a few options, and believes that a sensitivity analysis would help her to make the best business decision. She is considering three options, and is confident that..
Is there any statistically significant difference in how the drugs perform? If so, explain the effect. Use the post hoc tests as needed.
in each of the following situations the sampling frame does not match the population resulting in undercoverage. give
In exercises let X1 and X2 be independently and uniformly distributed over the intervals 0 to 1.
Use the Emperical Rule to find what two values 68% of the data will fall between for a data set with a mean of 219 and standard deviation of 20.
An accounting professor at a state university in Vermont recently gave a three-question multiple-choice quiz. What is the probability of getting a perfect score if you were forced to guess at each question?
If a = 0.05, use these data to evaluate the claim by the health plan.
When the study looked at other variables that are related to a doctor's choice of anesthetic, it found that Anesthetic C was not causing extra deaths.
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