2.3 Why visualize? Anscombes’s quartet (2)

• Table 2.2 shows results from a linear regression based on Anscombe’s quartet (Anscombe 1973)

Table 2.2: Linear models based on sets of Anscombe’s quartet

	Dependent variable:
	Set 1 (y1)	Set 2 (y2)	Set 3 (y3)	Set 4 (y4)
x1	0.500*** (0.118)
x2		0.500*** (0.118)
x3			0.500*** (0.118)
x4				0.500*** (0.118)
Constant	3.000** (1.125)	3.001** (1.125)	3.002** (1.124)	3.002** (1.124)
Observations	11	11	11	11
Note:	p<0.1; p<0.05; p<0.01

References

Anscombe, F J. 1973. “Graphs in Statistical Analysis.” Am. Stat. 27 (1): 17–21.