DE LEON.pdf

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Data Analysis • Compare results with US EPA standards • Correlations determined using IBM SPSS 19 • Spearman‟s correlation • Holm‟s tests of significance by Olkin-Finn Z statistic method (Cheung and Chan 2004) • Calculate Sensitivity, Specificity & Accuracy
Number of true negatives • SPECIFICITY = ------------------------------------------------------- X 100 Number of TN + Number of FP Number of True Positives • SENSITIVITY = --------------------------------------------------------- X 100 Number of TP + Number of FN Number of TP + Number of TN • ACCURACY = ------------------------------------------------------------ X 100 Where: # of TP + # of TN + # of FP + # of FN • True positives (TP) = pathogens present when IO above prescribed level • True negatives (TN) = pathogen absent when IO below prescribed level • False positives (FP) = IO above prescribed level but pathogen absent • False negative (FN) = IO below prescribed level but pathogen present
Page 1 and 2: Adequacy of Microbial Indicators of
Page 3 and 4: Adequacy of Microbial Indicators of
Page 5 and 6: • Pathogens are not detected easi
Page 7 and 8: • present when pathogens are pres
Page 9 and 10: Faecal Indicators Organisms include
Page 11 and 12: iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii
Page 13 and 14: The Problem
Page 15 and 16: Rationale • Region‟s heavy depe
Page 17 and 18: Objectives • To determine the ade
Page 19 and 20: Methodology
Page 21 and 22: Sampling • Samples collected in a
Page 23 and 24: Dominica
Page 25 and 26: Grenada
Page 27 and 28: Table 1. Standard Methods (2005) fo
Page 29: Data Compilation
Page 33 and 34: Water Quality • Total of 713 mari
Page 35 and 36: Frequency at which the sample count
Page 37 and 38: Correlations between Indicators and
Page 39 and 40: Marine Water Fresh Water Sensitivit
Page 41 and 42: Conclusions & Recommendations More
Page 43: Percentage true and false positives

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