ex0817

In a study of the effectiveness of biological control of the exotic
 weed tansy ragwort, researchers manipulated the exposure to the
 ragwort flea beetle on 15 plots that had been planted with a high
 density of ragwort. Harvesting the plots the next season, they
 measured the average dry mass of ragwort remaining (grams/plant) and
 the flea beetle load (beetles/gram of ragwort dry mass) to see if the
 ragwort plants in plots with high flea beetle loads were smaller as a
 result of herbivory by the beetles.

datasets

Data sets from Ramsey, F.L. and Schafer, D.W. (2013), "The
Statistical Sleuth: A Course in Methods of Data Analysis (3rd
ed)", Cengage Learning.

Berwin Turlach

Sleuth3

Data Sets from Ramsey and Schafer's "Statistical Sleuth (3rd
Ed)"

ex0817 function

A data frame with 15 observations on the following 2 variables.<dl class="dl-horizontal">
 <dt>Load</dt><dd>flee beetle load (in beetles/gram of ragwort dry mass)</dd>
 <dt>Mass</dt><dd>dry mass of ragwort weed</dd>
 </dl>

Format

Biological Pest Control — ex0817

A data frame with 15 observations on the following 2 variables.<dl class='dl-horizontal'>
 <dt>Load</dt><dd>flee beetle load (in beetles/gram of ragwort dry mass)</dd>
 <dt>Mass</dt><dd>dry mass of ragwort weed</dd>
 </dl>

ex0817: Biological Pest Control

Description

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References

Examples