A table at the texts Web site (www.stat.ufl.edu/ aa/cda/cda.html) shows the number of train miles (in millions)
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A table at the text’s Web site (www.stat.ufl.edu/ ∼aa/cda/cda.html) shows the number of train miles (in millions) and the number of collisions involving British Rail passenger trains between 1970 and 1984. A Poisson model assuming a constant log rate α̂ over the 14-year period has α̂ = – 4.177 (SE = 0.1325) and X2 = 14.8 (df = 13). Interpret.
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