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Public Health and Nutrition Fragments of protein waste, beta amyloids, may be a reliable marker…


Public Health and Nutrition Fragments of protein waste, beta amyloids, may be a reliable marker in

Alzheimer’s disease (AD) patients. Recent studies suggest that these protein fragments accumulate in the brain and form hard plaques, which are found in many AD patients. However, as omega-3 intake increases, there is some evidence to suggest that the beta amyloid blood level decreases.38 Suppose a study was conducted to investigate this relationship. A random sample of adults was obtained, the amount of omega-3 that each consumed in a day (x, in mg) was estimated, and the beta amyloids 40 level ( y, in pg/ml) was measured for each.

a. Find the estimated regression line, and complete the ANOVA table.

b. Conduct an F test for a significant regression. Use a = 0.01.

c. Find the coefficient of determination, r2.

d. Interpret your results. Do you believe that omega-3 intake is a good predictor of beta amyloid blood level? Why or why not?