Solution) Arsenic in groundwater. Refer to the Environmental Science Technology (Jan. 2005) study of the rel
Question: Arsenic in groundwater. Refer to the Environmental Science & Technology (Jan. 2005) study of the reliability of a commercial kit to test for arsenic in groundwater, Exercise 11.20 (p. 526). Recall that you fit a first-order model for arsenic level (y) as a function of latitude, longitude, and depth to the data saved in the ASWELLS file. Conduct a complete residual analysis of the model. Do you recommend any model modifications?
ASWELLS(Data for first and last five wells shown)
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Latitude | Longitude | Depth | Arsenic |
10 | 23.7887 | 90.6522 | 60 | 331 |
14 | 23.7886 | 90.6523 | 45 | 302 |
30 | 23.78 | 90.6517 | 45 | 193 |
59 | 23.7893 | 90.6525 | 125 | 232 |
85 | 23.7920 | 90.6140 | 150 | 19 |
7353 | 23.7949 | 90.6515 | 40 | 48 |
7357 | 23.7955 | 90.6515 | 30 | 172 |
7890 | 23.7658. | 90.6312 | 60 | 175 |
7893 | 23.7656 | 90.6315 | 45 | 624 |
7970 | 23.7644 | 90.6303 | 30 | 254 |
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Solution: The solution file consists of 3 pages
Type of Deliverable: Word Document![](/images/msword.png)
Type of Deliverable: Word Document
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