Arsenic is a compound naturally occurring

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Arsenic is a compound naturally occurring in very low concentrations. Arsenic blood concentrations in healthy individuals are normally distribution with mean = 3.2 micrograms per deciliter and standard deviation = 1.5 micrograms/deciliter. Some areas are known to have naturally elevated concentrations of arsenic in the ground and water supplies. We take two SRSs of 25 adults residing in two different high-arsenic areas.We seek evidence against the claim that mean = 3.2 micrograms/deciliter. What is the sampling distribution of the mean blood arsenic concentration (x bar) in many samples of 25 adults if the claim is true? Sketch the density curve of this distribution. (Sketch a normal curve, then mark the axis using what you know about locating the mean and standard deviation on a normal curve.)Suppose that the data from the first sample gives x-bar = 3.35 micrograms/deciliter. Mark this point on the axis of your sketch. Suppose that the second sample gives x-bar = 3.75 micrograms/deciliter. Mark this point on your sketch. Using your sketch, explain in plain language why one result is good evidence that the mean blood arsenic concentration of all adults in one high-arsenic area is greater than 3.2 micrograms/deciliter and why the outcome for the other high arsenic area is not.Please show each math/calculation step as I’m interested in making sure I’m using the right process, and not just knowing the right answer.

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