Upper Midwest Environmental Sciences Center
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Long
Term Resource Monitoring Program
Estimating
power to detect temporal trends in LTRMP metrics
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Disclaimer: This information is provided to help better inform ongoing LTRMP partner discussions. The power plots are generated from small sample sizes; all plots should be treated as approximate. Contact: Questions or comments may be directed
to Brian Gray, LTRMP statistician, Upper Midwest Environmental
Sciences Center, La Crosse, Wisconsin,
at brgray@usgs.gov. |
U.S. Department of the Interior |
U.S. Geological Survey
URL: http://www.umesc.usgs.gov/ltrmp/power_plots_fig1b.html
Page Contact Information: Contacting the Upper Midwest Environmental Sciences Center
Page Last Modified:
October 2, 2007
Figure 1b. Estimated power to detect temporal trends in mayfly (Ephemeridae) relative abundance in Pool 13 under the present sampling intensity (n = 120). Trends assumed exponential.
