es in the area of Cleveland, Ohio. These data are taken from the article "Variation in North American Regulatory Guidance for Heavy Metal Surface Soil Contamination at Commercial and Industrial Sites" (A. Jennings and J. Ma, J. Environment Eng, 2007:587-609). Cr: 260 19 36 247 263 319 317 277 319 264 23 29 61 119 33 281 21 35 64 30 Ni: 435 377 359 53 38 38 54 188 397 33 92 490 28 35 799 347 321 32 74 508 (a) Construct a histogram for each set of concentrations. (b) Find the 1st, 2nd and 3rd quartiles for the Cr concentrations (c) Find the 1st, 2nd and 3rd quartiles for the Ni concentrations
Following are measurements of soil concentrations (in mg /kg) of chromium (Cr) and nickel (Ni) at
20 sites in the area of Cleveland, Ohio. These data are taken from the article "Variation in North
American Regulatory Guidance for Heavy Metal Surface Soil Contamination at Commercial and
Industrial Sites" (A. Jennings and J. Ma, J. Environment Eng, 2007:587-609).
Cr: 260 19 36 247 263 319 317 277 319 264 23 29 61 119 33 281 21 35 64 30
Ni: 435 377 359 53 38 38 54 188 397 33 92 490 28 35 799 347 321 32 74 508
(a) Construct a histogram for each set of concentrations.
(b) Find the 1st, 2nd and 3rd
(c) Find the 1st, 2nd and 3rd quartiles for the Ni concentrations.
The given data is
Cr: 260,19,36,247,263,319,317,277,319,264,23,29,61,119,33,281,21,35,64,30
Ni: 435,377,359,53,38,38,54,188,397,33,92,490,28,35,799,347,321,32,74,508
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