ex2015 {Sleuth2} | R Documentation |
A study examined the association between nesting locations of the Northern Spotted Owl and availability of mature forests. Wildlife biologists identified 30 nest sites. The researchers selected 30 other sites at random coordinates in the same forest. On the basis of aerial photographs, the percentage of mature forest (older than 80 years) was measured in various rings around each of the 60 sites.
ex2015
A data frame with 60 observations on the following 8 variables.
Site
"Random"
and
"Nest"
PctRing1
PctRing2
PctRing3
PctRing4
PctRing5
PctRing6
PctRing7
Ramsey, F.L. and Schafer, D.W. (2002). The Statistical Sleuth: A Course in Methods of Data Analysis (2nd ed), Duxbury.
Ripple W.J., Johnson, D.H., Thershey, K.T. and Meslow E.C. (1991). Old–growth and Mature Forests Near Spotted Owl Nests in Western Oregon, Journal of Wildlife Management 55(2): 316–318.
str(ex2015)