gravel {dfphase1} | R Documentation |
This data set contains 56 individual bivariate observations from a gravel-producing plant given by Holmes and Mergen (1993). There are two variables measuring the percentage of the particles (by weight) that are large or medium in size, respectively.
data(gravel)
A 2x56 matrix.
D. S. Holmes, A. Mergen (1993) “Improving the Performance of the T2 Control Chart”, Quality Engineering, 5, pp. 619–625.
data(gravel) mphase1Plot(gravel)