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Data for Exercise 9.36 and Example 9.8
RanddA data frame/tibble with 12 observations on two variables
research and development expenditures (in million dollars)
sales (in million dollars)
Kitchens, L. J. (2003) Basic Statistics and Data Analysis. Pacific Grove, CA: Brooks/Cole, a division of Thomson Learning.
plot(sales ~ rd, data = Randd)
model <- lm(sales ~ rd, data = Randd)
abline(model, col = "purple")
summary(model)
plot(model, which = 1)
rm(model)
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