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You used the percentage of alcohol to predict wine quality. The data are stored in VinhoVerde. From the results of that problem, b1 = 0.5624

You used the percentage of alcohol to predict wine quality. The data are stored in VinhoVerde. From the results of that problem, b1 = 0.5624 and Sb1 = 0.1127.
a. At the 0.05 level of significance, is there evidence of a linear relationship between the percentage of alcohol and wine quality?
b. Construct a 95% confidence interval estimate of the population slope, b1.

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