Description Format References Examples
The diameter of tracking balls for computer mice from two different production lines. The nominal diameter of the ball is 2 cm.
A data frame with 20 observations on the following 2 variables.
line
a factor with levels A
B
diameter
diameter of the tracking ball (cm.)
Peter R. Nelson, Marie Coffin and Karen A. F. Copeland (2003), Introductory Statistics for Engineering Experimentation, Elsevier. (Appendix A)
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