woodpecker_multiyear

A dataset containing distances acorns of two oak species were carried by
acorn woodpeckers (Melanerpes formicivorus) to their granaries, in
two different years for each oak species. Data were collected in oak
savanna habitat in central California. Acorn woodpeckers store acorns in
central granaries, and different woodpecker social groups maintain
different granaries. The variables are as follows:
<ul>
<li> Species, the species of oak for the observed acorn ("lobata" for
 Quercus lobata, "agrifolia" for Quercus agrifolia)
 </li>
<li> Year, the year of observation (2002 and 2004 for
 Quercus lobata, 2006 and 2007 for Quercus agrifolia)
 </li>
<li> Granary, the woodpecker granary from which the acorn was collected
 </li>
<li> Distance, distance in metres from the acorn source tree to the
 granary
</li>
</ul>

datasets

Calculate a Mann-Whitney-Wilcoxon test for a difference between treatment levels using nested ranks.  This test can be used when observations are structured into several groups and each group has received both treatment levels. The p-value is determined via bootstrapping.  The nested ranks test is intended to be one possible mixed-model extension of the Mann-Whitney-Wilcoxon test, for which treatment is a fixed effect and group membership is a random effect.

Douglas G Scofield

nestedRanksTest

Mann-Whitney-Wilcoxon Test for Nested Ranks

woodpecker_multiyear function

Data frame with 534 rows and 4 variables.

Format

Dataset originates from the lab of Victoria L. Sork
 <a href="/link/vlsork%40ucla.edu?package=nestedRanksTest&version=0.2" data-mini-rdoc="nestedRanksTest::vlsork@ucla.edu">vlsork@ucla.edu</a> and is used with permission.

woodpecker_multiyear: Distances acorns of two oak species were carried by acorn woodpeckers in two different years.

Description

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Format

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References