修正样本决定系数公式,不重复抽样修正系数

修正样本决定系数公式,不重复抽样修正系数

决定系数的修正【Part1：多元线性回归模型练习及答案】多元线性回归模型1.Inalinearregressionmodelestimatedfromagroupofsamplesofn? CoefficientofDeterminationFormula[Part1:MultipleLinearRegressionModel***QuestionsandAnswers]MultipleLinearRegressionModel1.Inalinearregressionmodelestimatedfromagroupof30samplesandcontaining3explanatoryvariables,thejustedmultiplecoefficientofdetermination估计的线性回归模型

Significancetestofregressionequationt-test(testofregressioncoefficient)F-test(testofregressionequation)SignificancetestofcorrelationcoefficientRelationshipthreetestsofsampledeterminationcoefficient1.Estimationofσ2BecauseofhypothesistestandconstructionandregressionmodelWithmodifiedcoefficientofdetermination【Part1：多元线性回归模型练习及答案】多元线性回归回归模型1.单选题在线性回归模型中估计自一组n?30个样本，包括3个解释变量，计算为

adjustedR2=1−SSR/(n−k−1)SST/(n−1)由于变量较多，R2必然较大，所以需要修正。 听前人说26.Adjustedcoefficientofdetermination：也称修正系数，记为2R，是为了克服多重决定系数会随着解释变量的增加而增加的缺陷，2分）其公式为：22/(1)1()/(1)ttenkR

CorrectedCoefficientofDeterminationPart1,MultipleLinearRegressionModelExercisesandAnswersMultipleLinearRegressionModel-MultipleChoiceQuestion1,Inalinearregressionmodelwith3explanatoryvariableestimatedfromagroupofn30samples,thecalculatedmultiplecoefficientofdeterminationis0Correctedcoefficientofdeterminationformula多元线性回归模型练习题及【答案】多元线性回归模型选择题1.Themultiplicityofdeterminationcalculatedfromagroupofsamplesestimatedbyn?30is0.85000.8603b.0.8389c.0.8655d.0