Question: the following questions based on this given information only, not using the actual dataset. n = 14 y = 4.08, x = 4.44 SSXY =
the following questions based on this given information only, not using the actual dataset.
n = 14
y = 4.08, x = 4.44
SSXY = X(xi x)(yi y) = 12.292
SSX = X(xi x) 2 = 12.202
SSY = X(yi y) 2 = 14.524
X(yi yi) 2 = 2.142
(a) What is the correlation between individuals' cholesterol levels on the two diets?
(b) Consider the question of predicting what an individual's cholesterol levels will be on the oat bran diet based on his cholesterol levels on the corn flake diet. Fit a regression line to the relationship between the two cholesterol levels. What are the intercept and slope of the regression line?
(c) How would you interpret the slope term from part (b)?
(d) Test whether the slope term for your regression model from part (b) is significantly different from 0.
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