Given: An inner city open space area is suspected to have high levels of lead (P

Question

Given:

An inner city open space area is suspected to have high levels of lead (Pb) in its surface soil. The region of concern is 400 square meters in area and has the shape shown in figure 1. The region is gridded as shown ( half meter by half meter). 5 grids are selected at random (there were 72 partial grids which
are excluded from the population). After removing rocks and other debris from each sample, they are weighed and three 1 gram subsamples are selected from each primary sample. These 1gram samples are analyzed and the mass of Pb (in micrograms) in each 1 gram sample is determined. Measurement errors are assumed negligible. The data are given in table 1.

Find:

Estimate the mean concentration of Pb and the total mass of Pb present in this region. Calculate standard errors.

Figure 1

Table 1

Explanation / Answer

This is not an answer but just curious did you ever find the answer to this and if so could you post the solution? I have the same exact problem to work on now and am clueless to what I am doing.

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