633 MODEL SEL∈cod BE CAREFUL COMPARING MODELS USING THE SAME SET OF DATA USED TO MAKE THEM A LARGER M00∈ L WILL ALWAYs G叫E A68∈ TTER Fn( LDLER VN6) → MUST U5ENE小DAr千c。ARE GOOD MOOELS CIL STILL GIVE GooD PREDICT IONS ON THE NEW DATA AS WELL TY PICAL SCENARIO OLO DATA Ew OATA HIGHER ORo∈RAs GWE LOWER WN ON MODEL ORDER D DATA ACTUAL ORDER 4 BUT OVERF|T”TME DATA BY INCLVDING KNOWLEDGE OF PAKTICULAR NOISE MEASURED THIS EXTR"NosE"工川 Fo RMAT10A工 S NOT USEUL US SINCE WE PLAN TD USE工T DATA WITH DIfFERENT NOISE