Table 2.2.1   Results of statistical tests for difference in mean metal concentrations between years in lichens and caribour.* denotes significance at 5% level and ** denotes significance at 1% level. The power of the test is given if no significant difference was found. Trend Test significance (p)    power (p) Cd Lichens Nuuk 94<99 t-test 0.35 0.16 Isortoq 94>99 t-test 0.05* Caribou Liver     Ittinera    95<96,96>97,97<99 ANOVA 0.92 0.16 Liver     Isortoq 95<99 t-test 0.83 0.06 Hg     Lichens Nuuk 94>99 t-test 0.43 0.26 Isortoq 94<99 t-test 0.15 0.27 Caribou Liver     Ittinera    95<96,96>97>99 ANOVA <0.01** Liver     Isortoq 95>99 t-test <0.01** Se Lichens Nuuk 94>99 t-test 0.03* Isortoq 94>99 t-test 0.31 0.10 Caribou Liver     Isortoq 95>99 t-test <0.01**