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1、《统计学》习题解答第六章相关和回归分析【10】设销售收入X为自变量,销售成本Y为因变量。现在根据某百货公司12个月的有关资料,计算出以下数据:(1)建立一元线性回归方程,解释回归方程中回归系数的经济意义;(2)计算相关系数和可决系数,对变量的相关性和方程的拟合性进行评价;(3)预计明年1月份销售额为800万元,对销售成本进行点估计;(4)计算回归估计标准误差;(5)置信度为95%,利用拟合的回归方程对一月份销售成本进行区间预测。解:(1)求回归方程:(2)计算相关系数和可决系数:(3)回归预测——点预测:(4
2、)计算回归估计标准误差:(5)区间估计:如果样本容量够大可采用简化的形式:theprovisionsofHunanprovincesafetyproductionsupervisionandmanagementresponsibilities>(HunanZhengbanmade2013No.4),resolutelyimplementthesafetyproductionofthepartywithresponsibility,apairofresponsibility."Twoisissuedsafety
3、productionadministrationandinspectiontopromotetheresponsibilitiesbearsafetyproductionsupervisiondepartmentsstrictlyandeffectivelyassumedresponsibility.ThethreeistheestablishmentofenterpriseproductionsafetyhiddenWithselfcorrectionselfreportingsystem,promotet
4、heenterprisestoimplementthemainresponsibilityforproductionsafety.Thefouristheintroductionofstrengtheningcountysafetyproductionsupervisionabilityconstructionwork,promotesafeproductionresponsibilitytothegrassroots.3,strictaccountabilityandtargetmanagement.Adh
5、eretothe"whoisincharge,whoisresponsibleforthepipeindustrymustpipes,pipeproductionandmanagementmustcontrolsafetymanagementbusinessmustbesafe"principle,theimplementationofsafeproductionsupervisionandstagnationtocure."Theleadershipresponsiblesystem.Productions
6、afetyofkeytowns,keyenterprisesandkeyproblems,bythetownshipgovernmentandtheDepartmentresponsibleforthestagnationledthelumpsum,totackletough.Tofurtherincreasetheproductionsafetyindexassessment,strictimplementationofsafeproductionof"onevoteveto"awardandrecogni
7、tionsystem,strengthenproductionsafetyincentivemechanism(four).Adheretothepoliticalprinciplesagainstunwholesometendenciesexistenceoftheproblemisnotstrictinternalsupervision.Overtheyears,thegloballeadershipteammembersdonothaveanyillegalandotherbadrecords,butt
8、herearestillnotstrict,theimplementationdoesnotsurvivetheproblem.AfewleadingcadresnotstrictlyinaccordancewiththecountyPartycommittee,countygovernmentOnstrengtheningstyleconstructionrequirementsandstylec