case2202

The Del Norte Salamander (plethodon elongates) is a small (5--7
 cm) salamander found among rock rubble, rock outcrops and moss-covered
 talus in a narrow range of northwest California. To study the habitat
 characteristics of the species and particularly the tendency of these
 salamanders to reside in dwindling old-growth forests, researchers
 selected 47 sites from plausible salamander habitat in national forest
 and parkland. Randomly chosen grid points were searched for the
 presence of a site with suitable rocky habitat. At each suitable
 site, a 7 metre by 7 metre search are was examined for the number of
 salamanders it contained. This data frame contains the counts of
 salamanders at the sites, along with the percentage of forest canopy
 and age of the forest in years.

datasets

Data sets from Ramsey, F.L. and Schafer, D.W. (2002), "The
Statistical Sleuth: A Course in Methods of Data Analysis (2nd
ed)", Duxbury.

Berwin Turlach

Sleuth2

Data Sets from Ramsey and Schafer's "Statistical Sleuth (2nd
Ed)"

case2202 function

A data frame with 47 observations on the following 4 variables.<dl>
 <dt><code>Site</code></dt>
<dd>Investigated site</dd> <dt><code>Salaman</code></dt>
<dd>Number of salamanders found in 49 m$^2$ area</dd> <dt><code>PctCover</code></dt>
<dd>Percentage of canopy cover</dd> <dt><code>Forestage</code></dt>
<dd>Forest age</dd> 
</dl>

Format

Characteristics Associated with Salamander Habitat — case2202

A data frame with 47 observations on the following 4 variables.<dl>
 <dt><code>Site</code></dt>
<dd>Investigated site</dd>

 <dt><code>Salaman</code></dt>
<dd>Number of salamanders found in 49 m$^2$ area</dd>

 <dt><code>PctCover</code></dt>
<dd>Percentage of canopy cover</dd>

 <dt><code>Forestage</code></dt>
<dd>Forest age</dd>

 
</dl>

case2202: Characteristics Associated with Salamander Habitat

Description

Usage

Arguments

Format

References

Examples