A data frame with 20 observations on 8 synthetic real-valued variables, labelled as x1, y1, y2, y3, y4, y5, x2, y6.
x1Explanatory variable of first five data sets
y1Response variable of first data set
y2Response variable of second data set
y3Response variable of third data set
y4Response variable of fourth data set
y5Response variable of fifth data set
x2Explanatory variable of sixth data set
y6Response variable of sixth data set