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There was an accident at the industrial plant. Subsequent to the spill into the creek he water had Cr levels of 1.10 ppb n=6, S= 0.08. Could you state with 95% confidence that the Cr level in the creek had rise, that are these samples statistically the same as the values in part b? Part b values- 0.89, 0.92, 0.94, 0.97, 1.02. Mean = 0.948, std dev = 0.0497, 95% confidence interval: +/- 0.06

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