In 1974therewasasuspicionthatthenumberoflungcancercases wasextraordinarilyhighinthecityofFredericia(Clemmensenetal.,1974).Toin- vestigatewhetherthissuspicionwerejustified,cancerincidenceinFredericiawas compared tocancerincidenceinVejleindifferentagegroups.Thetablesbelowdis- play thenumberofcancercasesintwoagegroupsinthetwocities,andthesizesof the populationinthesameagegroups. Nowusetheresultsfromthepreviousexercisetoanswerthefollowingquestions: a) IsashiftedmultiplicativePoissonmodeladequateforthesedata? b) DoesthesuspicionconcerningahighincidenceoflungcancerinFredericiaseem justified? Cancer

In 1974therewasasuspicionthatthenumberoflungcancercases wasextraordinarilyhighinthecityofFredericia(Clemmensenetal.,1974).Toin-

vestigatewhetherthissuspicionwerejustified,cancerincidenceinFredericiawas compared tocancerincidenceinVejleindifferentagegroups.Thetablesbelowdis-

play thenumberofcancercasesintwoagegroupsinthetwocities,andthesizesof the populationinthesameagegroups.

Nowusetheresultsfromthepreviousexercisetoanswerthefollowingquestions:

a) IsashiftedmultiplicativePoissonmodeladequateforthesedata?

b) DoesthesuspicionconcerningahighincidenceoflungcancerinFredericiaseem justified?

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Cancer cases Population 55-64 70+ Total 55-59 60-64 Vejle 12 15 27 3398 1158 Fredericia 22 18 40 3859 1114 Total 34 33 67 7257 2272