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The p7.6 data frame has 12 observations on softdrink carbonation.
p7.6
data(p7.6)
This data frame contains the following columns:
carbonation
temperature
pressure
data(p7.6) y.lm <- lm(y ~ x1 + I(x1^2) + x2 + I(x2^2) + I(x1*x2), data=p7.6) summary(y.lm)
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