This is data file anscombe2.dat (derrived from Anscombe's classic graphics vs stat dataset)
Number of observations = 11
Number of variables = 5
Order of variables on a line image--
y1 y2 y3 y4 y5
Note--these 5 data sets are different in graphical structure
but have the following identical statistics--
sample size = 11
mean of x's = 9.0
mean of y's = 7.5
intercept = 3.0
slope = 0.5
resid. stand. dev. = 1.125
corr. coefficient = 81.7%
Source--Anscombe, Frank J. (1973). "Graphs in Statistical Analysis"
American Statistician, Vol. 27, February 1973.
To read this file into dataplot (& analyze)--
skip 25; read anscombe2.dat y1 y2 y3 y4
characters X; lines blank
multiplot 2 2
plot y1; plot y2; plot y3; plot y4
multiplot off
y1 y2 y3 y4 y5
----------------------------------------------
8.81 4.26 3.10 5.39 7.04
6.95 5.68 4.74 5.73 6.89
8.33 7.24 6.13 6.08 7.71
4.82 4.82 7.26 6.42 6.58
10.84 6.95 8.14 6.77 7.91
4.26 8.81 8.77 7.11 5.76
7.24 8.04 9.14 7.46 8.47
8.04 8.33 9.26 7.81 5.56
9.96 10.84 9.13 8.15 8.84
7.58 7.58 8.74 12.74 5.25
5.68 9.96 8.10 8.84 12.50