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"ID Bands May Harm Penguins," reported in BioEd Online in May 2004, explains: "Many bird species are monitored using metal bands around their legs. Researchers use information on individuals to deduce the birds' breeding and migration patterns. But penguins' legs are the wrong shape for bands, so the devices have to be attached to their flippers instead. This is a significant hindrance to the birds, say Michel GauthierClerc of the Station Biologique de la Tour du Valat in Arles, France, and his colleagues. They suspect that aluminum or stainlesssteel bands may hinder the penguins as they glide through the water."19 Four students must decide what statistical test would be carried out to test the theory that banded penguins swim slower than unbanded penguins. Which student is correct? Adam: You compare two groups of penguins so it's two-sided. It was probably paired because that's usually a better design. Brittany: Comparing two groups makes it a two-sample design, not two-sided. But the alternative should be two-sided anyway, because that's more conservative. Carlos: Comparing two groups makes it a two-sample design, but they should test a one-sided alternative because they suspect that the banded penguins swim slower. Dominique: I think it's a paired test with a one-sided alternative.
1. The data set calcium .txt contains the calcium levels of eleven test sub jects at zero hours and three hours after taking a multi-vitamin containing calcium.
Professor Stickler always grades "on the curve." "Yes, I see to it that my grades are distributed as 7 percent A's, 24 percent B's, 38 percent C's.
A researcher estimates an AR(1) model with an intercept and finds that the OLS estimate of Beta1 is 0.95, with a standard error of 0.002.
a. Formulate a linear programming model for this problem. b. Solve the model by using graphical analysis.
what is the probability of the event's complement?
a suppose there are two people in a room. what is the probability that they have the same birthday? hint find the
In a few sentences, describe two designs that can address your research question. The designs must involve two different statistical analyses. For each design, specify and justify each of the four factors and calculate the estimated sample size..
1. if the probability of an event is .3 that meansa. the event has a 70 chance of not occuringb. the complement of the
Two men are carrying a girl on a large plank that is 10m long and weights 200N. If the girl on a plank weighs 445N and sits 3m from one end, how much weight must each man support?
A sample of 1545 men and an independent sample of 1691 women were used to compare the amount of housework done by men and women in dual-earner marriages.
What type of statistical test best assesses the relationship between job satisfaction and level of stress and what test would be appropriate to determine whether the difference between men and women is real or due to chance variation?
From a random sample of 50 employees who resigned from the state university system over the past 5 years, the average time between the termination date and reimbursement was 75 days, with a standard deviation of 15 days. Use the data to estimate t..
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