(Answered) Two sets of chromium analyses were performed on water

Statistics

Two sets of chromium analyses were performed on water samples from a stream that runs near a chromium plating plant:

Before the spill After the spill

Mean: 0.95 ppm Cr 1.10 ppm

N 5 6

S 0.05 ppm 0.08 ppm

Could it be stated, at the 95% confidence level, that after and before the spill there was no difference in the chromium level in the stream?

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