tvt体育:回归方程∑xi怎么算(вҲ‘xiyiжҖҺд№Ҳе

回归方程∑xi怎么算

tvt体育зәҝжҖ§еӣһеҪ’зі»ж•°rжҖҺд№ҲжұӮ?r=вҲ‘(Xi-Xзҡ„е№іеқҮж•°Yi-Yе№іеқҮж•°)/ж№еҸ·дёӢ[вҲ‘(Xi-Xе№іеқҮж•°)^2*вҲ‘(Yi-Yе№іеқҮж•°)^2]йқһзәҝжҖ§еӣһеҪ’зі»ж•°жҖҺд№ҲжұӮ?еҸҜд»ҘйҮҮеҸ–жҚўе…ғжі•,е…ҲиҪ¬еҢ–дёәзәҝжҖ§еӣһеҪ’,еҲ©з”ЁжңҖе°ҸдәҢд№ҳжі•еҫ—еҮәзі»tvt体育:回归方程∑xi怎么算(вҲ‘xiyiжҖҺд№ҲеҢ–з®Җ)(еҚ•дҪҚ:зҷҫдёҮе…ғ)2327иЎЁдёӯзҡ„ж•°жҚ®жҳҫзӨә,XдёҺд№Ӣй—ҙеӯҳеңЁзәҝжҖ§зӣёе…іе…ізі»,иҜ·е°Ҷ(2)зҡ„з»“жһңеЎ«е…Ҙз©әзҷҪжҸ,并计算关дәҺXзҡ„еӣһеҪ’ж–№зЁӢ.йҷ„е…¬ејҸ:nвҲ‘xynxyi=1b=n⑵x2-nxi=1,a=y-bx.зӣёе…ізҹҘиҜҶзӮ№:жҺ’

вҲ‘(xi-Xyi-Y)=вҲ‘(xiyi-Xyi-xiY+XY)=(вҲ‘xiyiXвҲ‘yi-YвҲ‘xi+nXY=(вҲ‘xiyiX(nYY(nXnXY=(вҲ‘xiyinXYз»“жһңдёҖйўҳзӣ®еӣһеҪ’ж–№зЁӢе…¬ејҸдёӯзҡ„b=вҲ‘(xi-Xyi-Y)/вҲ‘(xi-X)^2жҖҺд№ҲеҢ–

(еҚ•дtvt体育ҪҚ:зҷҫдёҮе…ғ)2327иЎЁдёӯзҡ„ж•°жҚ®жҳҫзӨә,XдёҺд№Ӣй—ҙеӯҳеңЁзәҝжҖ§зӣёе…іе…ізі»,иҜ·е°Ҷ(2)зҡ„з»“жһңеЎ«е…Ҙз©әзҷҪжҸ,并计算关дәҺXзҡ„еӣһеҪ’ж–№зЁӢйҷ„е…¬ејҸ:nвҲ‘xynxyi=1b=n⑵x2-nxi=1,a=y-bx.зӣёе…ізҹҘиҜҶзӮ№:жҺ’

вҲ‘xiyiжҖҺд№ҲеҢ–з®Җ

вҲ‘жҳҜиҝһеҠеҸ·,е°ұжҳҜе°ҶжүҖжңүеҠеҸ·зңҒеҺ»дәҶ.дёӢйқўi=1д»ЈиЎЁiд»Һ1ејҖе§ӢеҸ–,дёҖзӣҙеҸ–еҲ°n,еҶҷејҖе°ұжҳҜвҲ‘Xiе№іж–№=X1е№іж–№+X2е№іж–№X3е№іж–№+вҖҰвҖҰ+Xnе№іж–№жіЁж„ҸеҸҳйҮҸжҳҜi,еҰӮжһңеҸійқўжҳҜXijе№іж–№,з»“жһң

зҺ°еңЁд»ӨиҰҒе»әз«Ӣзҡ„дёҖе…ғзәҝжҖ§еӣһеҪ’ж–№зЁӢзҡ„жҮеҮҶеҪўејҸдёәyc=a+bx,дҫқжҚ®жңҖе°ҸдәҢд№ҳжі•еҺҹзҗҶ,еӣеҸҳйҮҸе®һйҷ…еҖјyдёҺдј°и®ЎеҖјycзҡ„зҰ»е·®е№іж–№е’ҢдёәжңҖе°ҸеҖј,еҚіQ=вҲ‘(y-yc)2еҸ–еҫ—жңҖе°ҸеҖјгҖӮдёәдҪҝQ=вҲ‘(y

и§Јзӯ”и§Јв…)и®ҫеӣһеҪ’зӣҙзәҝзҡ„ж–№зЁӢжҳҜ:\=bx+a\=bx+a,ВҜВҜВҜy=3.4,ВҜВҜВҜx=6yВҜ=3.4,xВҜ=6,вҲҙ\=вҲ‘ni=1xiyiвҲ’nВҜВҜВҜxВҜВҜВҜyвҲ‘ni=1xi2вҲ’nВҜВҜВҜx2\

第дәҢиҠӮзӣҙзәҝеӣһеҪ’дёҖгҖҒзӣҙзәҝеӣһеҪ’ж–№зЁӢзҡ„ж„Ҹд№үи®Ўз®—еҮәзӣёе…ізі»ж•°еҗҺ,еҰӮжһңrжҳҫи‘—,дё”еҸҲйңҖиҰҒиҝӣдёҖжӯҘдәҶи§ЈдёӨеҸҳйҮҸдёӯдёҖдёӘеҸҳйҮҸдҫқеҸҰдёҖдёӘеҸҳйҮҸиҖҢеҸҳеҠЁзҡ„规еҫӢж—¶,еҲҷеҸҜиҝӣиЎҢеӣһеҪ’еҲҶжһҗгҖӮвҖң

вҲҸi=1N[ПҖ(xi)]yi[1вҲ’ПҖ(xi)]1вҲ’yiеҜ№ж•°дјјз„¶еҮҪж•°дёә:L(w)=вҲ‘i=1N[yilogПҖ(xi1вҲ’yi)log(1вҲ’ПҖ(xi]=вҲ‘i=1N[yilog(ПҖ(xi)1вҲ’ПҖ(xilog(1вҲ’ПҖ(xi]=вҲ‘i=1Ntvt体育:回归方程∑xi怎么算(вҲ‘xiyiжҖҺд№ҲеҢ–з®Җ)ж№жҚ®tvt体育еӣһеҪ’еҲҶжһҗ,еҸҜд»ҘеҹәдәҺеҺҶеҸІж•°жҚ®жқҘйў„жөӢеҮҪж•°гҖӮзӣёе…іе…¬ејҸжңү:a[вҲ‘xi2вҲ‘yi-вҲ‘xiвҲ‘дјҠзЁҖ]/[nвҲ‘xi2вҲ‘xi)2],b[nвҲ‘дјҠзЁҖ-вҲ‘xiвҲ‘yi]/[nвҲ‘xi2вҲ‘xi)2]гҖӮ