.BG D
.VE $Header: /usr3/s/current/s/data/.help/RCS/evap,v 1.2 83/12/30 23:08:37 rab Exp $
.FN evap
.TL
evap: Soil Evaporation Data
.PP
.AG collab
column labels for `x'.
.AG x
matrix of independent variables: maximum daily soil
temperature, minimum daily soil temperature average soil
temperature (integrated area under daily soil temperature
curve), maximum, minimum, and average air temperature,
maximum, minimum, and average relative humidity, and total
wind (miles per day).
.AG y
daily amount of evaporation from the soil.
.PP
"It is desired to estimate the daily amount of evaporation from the
soil as a function of air temperature, relative humidity, and wind.
Since these factors vary considerably throughout the day it is not
clear what function or aspect of these variables is most important.
For this reason the following ten variables relating to these factors
are recorded." (from Freund).
.PP
Observations represent 46 consecutive days from June 6 through July
21.
.SH SOURCE
R. J. Freund, "Multicollinearity etc., Some "new" Examples",
.ul
American Statistical Association Proceedings of Statistical Computing Section,
1979, pp 111-112.
Republished by permission of the American Statistical Association.
.KW dataset
.WR
