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Published byRachel Parks Modified over 9 years ago
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Overview Analysis of Research Data “Fake” Data Generation Analysis and Comparison
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Research Data 24 sites Trapped over 1 month Covariates: –Temporal Moon phase –Spatial Vegetation Moisture Bare ground Statistics needed: –Capture probability by night –Effect of moon phase on capture probability –Effect of spatial covariates on abundance
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Data Generation Sample Poisson for true abundance Apply capture probability individual by night Moon effect Capture history for a site TE Heterogeneity of trap response Abundance Spatial effect
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Goals of Data Generation To create a history of deer mice captures for 24 plots with a known true abundance known spatial impacts on total abundance and know effect of temporal considerations on capture probability Apply a treatment effect to half of the sites –5% –25% –50%
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Analysis Capture Histories Basic Analysis RMark T Test and CI CI width, Estimated mean, Deviance from true mean Loop Distribution of statistics for each analysis Hierarchical Analysis
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Goals of Analysis Generate distributions of statistics generated by each analysis and compare. Determine whether there is a difference between the results of each type of analysis Determine which analysis produces results closer to the truth
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