For the soil arsenic data described in Example 19.2 of Section 19.4.1, use the approximate sample size formula of Equation 19.2 in that section to compute the recommendedminimum data sample size for (A)two-sided 99% confidenceinterval on the population mean arsenic concentration; and (B) one-sided 99% upper confidence limit. (C) Obtain the recommended sample size for this analysis using ProUCL’s Number of Samples -> Estimate Mean menu. Compare and comment on the results. (D) These computations assumethatthe datato be collected will be normally distributed and free of outliers.What are the sample sizes if the data are not normally distributed, as is more likely than not to be the case? Hint: Try using VSP. (E) After collecting the samples, what steps should be taken to verify the adequacy of the sample size?

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