Permeation sampling is a method of sampling air in buildings for pollutants. It

Question

Permeation sampling is a method of sampling air in buildings for pollutants. It can be used over a long period of time and is not affected by humidity, air currents, or temperature. In the paper “Calibration of Permeation Passive Samplers with Silicone Membranes Based on Physicochemical Properties of the Analytes” (Analytical Chemistry 75: 3182-3192), B. Zabiegata, T. Gorecki, and J. Namiesnik obtained calibration constants experimentally for samples of compounds in each of four compound groups. For the given data: a. Use ANOVA to indicate whether there is sufficient evidence to conclude that a difference exists in mean calibration constant among the four data groups.

Explanation / Answer

since F < critical value we fail to reject Ho

conclusion : there is no evidence to conclude that there is a difference between the 4 mean calibration constant among the 4 data groups

esters alcohols alipahtic aromatic Análisis de varianza de un factor 0.185 0.185 0.23 0.166 0.155 0.16 0.184 0.144 RESUMEN 0.131 0.142 0.16 0.117 groups count sum average variance 0.103 0.122 0.132 0.072 esters 5 0.638 0.1276 0.0021768 0.064 0.117 0.1 alcohols 10 1.206 0.1206 0.00114649 0.115 0.064 alipahtic 6 0.87 0.145 0.0035452 0.11 aromatic 4 0.499 0.12475 0.00163825 0.095 0.085 0.075 ANOVA variations SS df MS F p value critical value between 0.00231789 3 0.00077263 0.38940848 0.7618167 3.07246699 within 0.04166635 21 0.00198411 Total 0.04398424 24

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