Variance in arsenic concentration in drinking water

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Given that the variance in arsenic concentration in drinking water is 8 ppb, what is the power of a test based on 10 samples to determine if arsenic levels exceeds the public health standard of 5 ppb by 2 ppb. Assume that the test is performed at a= .05. what sample size would be nessary to have a=b=.05?

Reference no: EM13309731

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