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Biology and Environmental Science A recent study suggests that the onset of Alzheimer’s disease…

Biology and Environmental Science A recent study suggests that the onset of Alzheimer’s disease (AD) is related to exposure to microorganisms.24 A greater exposure to microorganisms may actually protect against AD. A random sample of countries was obtained and a measure of contemporary parasite stress (x) and AD burden (y) was recorded for each. The data are given in the following table.

Biology and Environmental Science A recent study suggests that the onset of Alzheimer’s disease...

a. Find the estimated regression line. Explain the relevance of the sign on the estimate of β1 in the on text of this problem.

b. Conduct an F test for a significant regression. Find the p value associated with this test.

c. Suppose the United States has a parasite stress of approximately 5.6. Find a 95% confidence interval for the true mean AD burden in the United States.