Regarding the concentration of 60 Co in water samples, it shows an increasing trend.
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Long-term radiological assessment of a Mediterranean freshwater ecosystem surrounding a nuclear power plant.
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The sentences
The test is based on two hypotheses: the null hypothesis (H 0 ) states that there is no trend, while the alternative hypothesis (H 1 ) suggests the presence of a significant trend over a given time period.
This is why a decreasing trend can be observed in activity levels of 90 Sr in carp and bulrush samples.