《统计学概论》计算题参考答案

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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