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Table 3

Mann-Kendall and linear regression applied to annual 95th percentile at the Look Rock, TN site. DOI: https://doi.org/10.1525/elementa.279.t3

MethodTime periodNumber of valid yearsTrend estimate (ppb/yr)p-valueLower 95% conf. limit (ppb/yr)Upper 95% conf. limit (ppb/yr)R2 (%)

 
Mann-Kendall 1990–2013 24 –0.31 0.0866 –0.84 NA 
regression 1990–2013 24 –0.36 0.0770 –0.77 0.04 14 
MethodTime periodNumber of valid yearsTrend estimate (ppb/yr)p-valueLower 95% conf. limit (ppb/yr)Upper 95% conf. limit (ppb/yr)R2 (%)

 
Mann-Kendall 1990–2013 24 –0.31 0.0866 –0.84 NA 
regression 1990–2013 24 –0.36 0.0770 –0.77 0.04 14 
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