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A researcher is interested in whether contaminants discharged into a river reduce invertebrate biomass (g/m^2). Biomass is sampled from several sites downstream of a source of contaminants and several upstream sites. The raw effect size is calculated as mean biomass of upstream sites - mean biomass of downstream sites. The graph below represents a post hoc power analysis of the study to detect the smallest effect the researchers deems to be of biological interest. dt(x, 11) 0.4 0.3 0.2 0.1 0.0 T T -4 -2 S 0 X α 2

A researcher is interested in whether contaminants discharged into a river reduce invertebrate biomass (g/m^2). Biomass is sampled from several sites downstream of a source of contaminants and several upstream sites. The raw effect size is calculated as mean biomass of upstream sites - mean biomass of downstream sites. The graph below represents a post hoc power analysis of the study to detect the smallest effect the researchers deems to be of biological interest. dt(x, 11) 0.4 0.3 0.2 0.1 0.0 T T -4 -2 S 0 X α 2

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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What is the null hypothesis given the way the solid green line is drawn on the graph?

A researcher is interested in whether contaminants discharged into a river reduce invertebrate biomass (g/m^2). Biomass is sampled from several sites downstream of a source of contaminants and several upstream sites. The raw effect size is calculated as mean biomass of upstream sites - mean biomass of downstream sites. The graph below represents a post hoc power analysis of the study to detect the smallest effect the researchers deems to be of biological interest. dt(x, 11) 0.4 0.3 0.2 0.1 0.0 T -4 -2 В 0 X α 2 4
Transcribed Image Text:A researcher is interested in whether contaminants discharged into a river reduce invertebrate biomass (g/m^2). Biomass is sampled from several sites downstream of a source of contaminants and several upstream sites. The raw effect size is calculated as mean biomass of upstream sites - mean biomass of downstream sites. The graph below represents a post hoc power analysis of the study to detect the smallest effect the researchers deems to be of biological interest. dt(x, 11) 0.4 0.3 0.2 0.1 0.0 T -4 -2 В 0 X α 2 4
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