Feasibility Study and Technical Report - Pretivm

14.6 COMPOSITING OF ASSAY INTERVALSAll data was composited to the dominant sample length of 1.5 m prior to analysis andestimation.14.6.1 SUMMARY STATISTICSStatistical analysis of the gold and silver data was carried out by lithological domain (atVOK) and mineralized domain (high grade and low grade).Review of the statistics for VOK indicated that the grade distributions for themineralization within the different lithologies are very similar, and as a result these werecombined for analysis.Initial review of the individual high-grade corridors within each area showed that theyhave similar statistical distributions, therefore the individual corridors within each areawere combined for statistical analysis and variography.All high-grade domains, including the West Zone domain, exhibit a strong positiveskewness with high coefficient of variation and extreme grades. The low-grade domainsalso show positively skewed distributions but have lower coefficients of variation and fewextreme grades.Table 14.1 summarizes the statistics for gold and silver for the mineralized domains.Due to clustering of the drilling, the data for West Zone has been declustered forstatistical analysis.Table 14.1Summary Statistics of Composited Data for Mineralized Domains – VOKStatistic Gold g/t Silver g/tSamples 57,895 57,895Minimum 0.00 0.02Maximum 14,043.71 9,383.44Mean 3.39 8.85Standard Deviation 93.63 56.32Coefficient of Variation 27.61 6.36Variance 8,767.00 3,172.00Skewness 86.95 93.40Pretium Resources Inc. 14-6 1291990200-REP-R0012-02Feasibility Study and Technical Report on the BrucejackProject, Stewart, BC