Description Format References Examples
Web site traffic during a marketing campaign
A data frame with 10 observations on the following 2 variables.
weeks
weeks into the marketing campaign - an ordered
factor with levels 1
to 5
traffic
web site traffic (1000's of hits per day)
Peter R. Nelson, Marie Coffin and Karen A. F. Copeland (2003), Introductory Statistics for Engineering Experimentation, Elsevier. (Appendix A)
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