webvisit dataset

1.1

data

Web site visits over a 3-week period

Format

A data frame with 21 observations on the following variable.

• visits: a numeric vector

References

Peter R. Nelson, Marie Coffin and Karen A. F. Copeland (2003), Introductory Statistics for Engineering Experimentation, Elsevier. (Appendix A)

Examples

str(webvisit)
densityplot(~ visits, webvisit,
            xlab = "Web site visits in a 3-week period")
qqmath(~ visits, webvisit, aspect = 1, type = c("g","p"),
       ylab = "Web site visits in a 3-week period",
       xlab = "Standard normal quantiles")
with(webvisit, summary(visits))