phones {boot} | R Documentation |
year |
The last two digits of the year. |
calls |
The number of telephone calls made (in millions of calls). |
The phones
data frame has 24 rows and 2 columns.
This data frame contains the following columns:
The data were obtained from
Rousseeuw, P.J. and Leroy, A.M. (1987) Robust Regression and Outlier Detection. John Wiley.
Davison, A.C. and Hinkley, D.V. (1997) Bootstrap Methods and Their Application. Cambridge University Press.
Venables, W.N. and Ripley, B.D. (1994) Modern Applied Statistics with Splus. Springer-Verlag