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You have been asked to determine on what types of grasslands two species of birds, northern harriers and short-eared owls, build nests. The types of grasslands to be used include undisturbed native grasses, managed native grasses, undisturbed nonnative grasses, and managed nonnative grasses. (Based on the article "Response of Northern Harriers and Short-Eared Owls to Grassland Management in Illinois," Journal of Wildlife Management [1999]: 517-523.)
a. You are allowed a plot of land 500 meters square to study. Explain how you would determine where to plant the four types of grasses. What role would random assignment play in this determination?
b. Identify any confounding variables.
c. Would this study be considered an observational study or an experiment?
The effects of peer pressure on mathematics achievement. Researchers were interested in comparing the relationship between high achievement in mathematics.
Assume that stock is currently selling for $100. The change in the stock's price throughout the nest year follows a normal random variable with a mean of $10 and a standard deviation of $20.
Find a 95% confidence interval for the difference in population proportions of male policemen and men of other occupations who have heart disease.
A researcher measures the relationship between Internet use (hours per week) and social interaction (hours per week) in a sample of 10 students.
please answer the question in full providing any relevant equations or diagrams used to come to a final answer.a in a
for a certain musician his favorite brand of guitar picks is far more likely to chip accidentally and become useless
A study conducted by the research department of a pharmaceutical company claims that the annual spending (per person) for prescription drugs for allergy relief,is greater than or equal to the annual spending (per person) for non-prescription aller..
What does develop an introduction to your paper that provides a brief overview of the article and the main points of your analysis. In a reseach essay mean?
Suppose that in a certain population, individuals' heights are approximately normally distributed with parameters µ = 70 and s = 3 in.
For each column, identify whether the data is qualitative or quantitative. Identify the level of measurement for the data in each column.
Construct the ANOVA table needed to test whether the data provide sufficient evidence to indicate a difference in the mean dissolved oxygen contents for the four locations and use Tukey's test to compare water pollution in the four locations.
What is the expected value of the time it takes you to commute?- Is the expected value ever equal to the actual commute time? Explain.
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