"2020.5.15_多元分析1_回归分析步骤及模型建立与检验"

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2020年5月15日,信171班的学生李金哲在多元分析课程中学习了回归分析的一般步骤。在一元线性回归分析中,他了解到需要确定解释变量和被解释变量,建立回归方程,并预测平均值。而在多元线性回归分析中,他学习了如何处理多个解释变量,建立包含多个参数的回归方程。此外,他也学习了曲线估计的操作及其分析方法。 首先,在回归分析的一般步骤中,李金哲了解到需要确定解释变量和被解释变量。回归分析旨在分析一个事物如何随其他事物的变化而变化,因此首先需要确定哪个是被解释变量(记为y),哪些是解释变量(记为x)。通过建立回归方程,能够在给定解释变量的条件下预测被解释变量的平均值。这与相关分析有所不同,相关分析仅是通过描述两个变量之间的关系,而回归分析则更注重因果关系。 其次,在确定回归模型方面,李金哲学习了根据函数拟合方式,通过观察散点图确定应采用何种数学模型来概括回归线。如果被解释变量和解释变量之间存在线性关系,则应进行线性回归分析,建立线性回归模型;反之,如果存在非线性关系,则应进行非线性回归分析,建立非线性回归模型。 接着,建立回归方程是回归分析的重要一步。根据收集到的样本数据以及确定的回归模型,通过一定的统计拟合准则估计出模型中的各个参数,从而得到一个确定的回归方程。这个回归方程将成为预测和分析数据的基础,为后续的分析提供依据。 最后,在对回归方程进行各种检验方面,李金哲学习了回归方程的可靠性检验。通过对回归方程的假设进行检验,可以评估模型的拟合优度,如残差分析、方差分析等。这些检验能够帮助确认回归方程的有效性,以及对模型进行进一步的改进和优化。 综上所述,回归分析是一种重要的统计方法,可以帮助研究者了解变量之间的关系,并进行预测和分析。通过学习回归分析的一般步骤,李金哲对于如何确定和建立回归方程有了更深入的理解。这将有助于他在未来的研究和实践中更好地运用回归分析方法,为数据分析提供更有力的支持。

select * from (select t1.[id] as t1_id,t1.[requestId] as t1_requestId,t1.[htqsrq] as t1_htqsrq,t1.[htjzrq] as t1_htjzrq,t1.[htbh] as t1_htbh,t1.[gf] as t1_gf,t1.[xf] as t1_xf,t1.[rq] as t1_rq,t1.[fkfs] as t1_fkfs,t1.[formmodeid] as t1_formmodeid,t1.[modedatacreater] as t1_modedatacreater,t1.[modedatacreatertype] as t1_modedatacreatertype,t1.[modedatacreatedate] as t1_modedatacreatedate,t1.[modedatacreatetime] as t1_modedatacreatetime,t1.[modedatamodifier] as t1_modedatamodifier,t1.[modedatamodifydatetime] as t1_modedatamodifydatetime,t1.[form_biz_id] as t1_form_biz_id,t1.[MODEUUID] as t1_MODEUUID,t1.[htfj] as t1_htfj,t1.[zje] as t1_zje,t1.[ds] as t1_ds,t1.[zjedx] as t1_zjedx,t1.[cspp] as t1_cspp,t1.[yfk] as t1_yfk,t1.[gxid] as t1_gxid,t1.[bz] as t1_bz,t1.[gfqymc] as t1_gfqymc,t1.[gfjc] as t1_gfjc,t1.[bh] as t1_bh,t1.[jylx] as t1_jylx,t1.[cght] as t1_cght,t1.[yf] as t1_yf,t1.[yfk1] as t1_yfk1,t1.[yf11] as t1_yf11,t1.[nf] as t1_nf,t1.[rksj] as t1_rksj,t1.[cclx] as t1_cclx,t1.[cgbt] as t1_cgbt,t1.[yfk2] as t1_yfk2,t1.[sywf] as t1_sywf,t1.[yfbl] as t1_yfbl,t1.[fhbl] as t1_fhbl,t1.[yfh] as t1_yfh,t1.[sykf] as t1_sykf,t1.[hzsdlqys] as t1_hzsdlqys,t1.[sys_workflowid] as t1_sys_workflowid,t1.[cgqzyz] as t1_cgqzyz,t1.[htwjpdf] as t1_htwjpdf,t1.[cghtlc] as t1_cghtlc,t1.[htzt] as t1_htzt,t1.[qzfs] as t1_qzfs,t1.[htwjtp] as t1_htwjtp,t1.[cgqzlc] as t1_cgqzlc,t1.[sjfk] as t1_sjfk,t1.[ydkds] as t1_ydkds,t1.[chpt] as t1_chpt,t1.[lxdhchr] as t1_lxdhchr,t1.[gxsjkx] as t1_gxsjkx,t1.[hkzt] as t1_hkzt,t1.[lcfkd] as t1_lcfkd,t1.[fkzlcid] as t1_fkzlcid,t1.[mode_top_4] as t1_mode_top_4,t1.[cgdj] as t1_cgdj,t1.[mode_top_22] as t1_mode_top_22,t2.[id] as t2_id,t2.[mainid] as t2_mainid,t2.[sld] as t2_sld,t2.[ppcj] as t2_ppcj,t2.[hsdj] as t2_hsdj,t2.[bz] as t2_bz,t2.[je] as t2_je,t2.[xhggyt] as t2_xhggyt,t2.[mxgxid] as t2_mxgxid,t2.[dqkckc] as t2_dqkckc,t2.[rkhkc] as t2_rkhkc,t2.[yf] as t2_yf,t2.[yldjbhyf] as t2_yldjbhyf,SELECT year(rksj) as 年 FROM uf_gfht as cus_年年 from uf_gfht t1 INNER join uf_gfht_dt1 t2 on t1.id = t2.mainid) tmp1 where t1 错在哪里

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