Question: The following table shows the typical depth (rounded to the nearest foot) for nonfailed wells in geological formations in Baltimore County (The Journal of Data

The following table shows the typical depth (rounded to the nearest foot) for nonfailed wells in geological formations in Baltimore County (The Journal of Data Science, 2009, Vol. 7, pp. 111€“127).

Nonfailed Well Depth Geological Formation Group Number of Nonfailed Wells Gneiss 1,515 255 Granite 26 218 Loch Raven Sch

Calculate the probability mass function of depth for nonfailed wells from the table.

Nonfailed Well Depth Geological Formation Group Number of Nonfailed Wells Gneiss 1,515 255 Granite 26 218 Loch Raven Schist 3,290 317 Mafic 349 231 Marble 280 267 255 Prettyboy Schist 1,343 Other schists 887 267 Serpentine 36 217 Total 7,726 2,027

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