00393nam a2200145Ia 4500001000500000005001700005008004100022020001500063082001700078100001800095245004900113250000700162260001200169650006600181603420261006003918.0120911s9999    xx            000 0 und d  a0534515843  a658.4033 KEL  aKeller Gerald  aStatistics : for management and economics 4e  a4E  aDuxbury  aManagement-statistics methods 2. Economics-statistics methods