=+27. Consider the following four (x, y) data sets; the first three have the same x values, so these values are listed only once (from “Graphs in Statistical Analysis,” Amer. Statistician, 1973: 17–21).

For each of these four data sets, the values of the summary quantities, ^xi

, ^yi, and so on, are almost identical, so the equation of the least squares line(yn 5 3 1 .5x), SSResid, SSTo, r 2

, and se will be