Supporting Technical Assessments

| Conclusion | Waihi North Project Air Discharge Assessment - Waihi Surface Facilities | 4396626-1331619777-99 | 16/06/2022 | 76 Statistical Analysis A non-parametric Wilcoxon Rank Sum test was carried out to determine whether there are any differences between mean values of monthly dust deposition data collected between Jan 2000 – December 2020 from the different monitoring locations. The P values were adjusted by the Bonferroni method. Table E1 summarises the results of the test. P values lower than 0.05 are highlighted in blue. These values indicate that there is some statistical evidence to indicate there is a difference between the distributions of the dust deposition rate at the two monitoring sites. Table C1. P-values from statistical analysis of monthly dust deposition data (Jan 2000 – December 2020) using the Wilcoxon Rank Sum test and Bonferroni adjustment 6.00 (Bulltown Rd) 6.59 (TorrensAlex) 6.60 (TorrensTE) 6.61 (Leaches) 6.63 (Met Station) 6.66 (College) 6.7 Smith) 6.71 (Morrison) 6.59 (Torrens-Alex) 1 - - - - - - - 6.60 (Torrens-TE) 0.7432 1 - - - - - - 6.61 (Leaches) 0.00152 0.0002 0.00342 - - - - - 6.63 (Met Station/Office) 8.00E-05 6.40E-08 1.20E-06 1 - - - - 6.66 (College) 1 1 1 1.40E-07 2.60E-12 - - - 6.7 (Smith) 0.5927 1 1 0.09359 0.00017 1 - - 6.71 (Morrison) 0.00294 9.90E-05 0.00225 1 1 3.60E-07 0.04186 - 6.72 (Baxter Rd) 1 1 0.23428 5.00E-08 1.30E-11 1 0.12296 9.80E-08 A non-parametric Wilcoxon Rank Sum test was carried out to determine whether there are any differences between the distribution of 7-day average TSP concentration data collected between Jan 2005 – December 2020 from the different monitoring locations. The P values were adjusted by the Bonferroni method. Table E2 summarises the results of the test. P values lower than 0.05 are highlighted in blue. These values indicate that there is some statistical evidence to indicate there is a difference between the TSP concentrations recorded at the two monitoring sites. Table C2. P-values resulting from statistical analysis of 7-day average TSP concentrations (Jan 2005 – December 2020 using the Wilcoxon Rank Sum test and Bonferroni adjustment) 6.61 (Grey St) 6.63 (Met Station) 6.64 (Courthouse) 6.65 (Old House) 6.66 (College) 6.63 (Met Station/Office) 1.60E-05 - - - - 6.64 (Courthouse) 0.13064 0.16968 - - - 6.65 (Old House) 0.00017 < 2e-16 3.60E-11 - - 6.66 (College) 2.00E-10 < 2e-16 < 2e-16 0.07359 - 6.78 (Slevin St) 1 1.90E-06 0.06289 0.08632 8.10E-06

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