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ID:20252670
大小:1.03 MB
页数:25页
时间:2018-10-11
《生物统计学答案 第十章 一元回归及简单相关分析》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、第十章一元回归及简单相关分析10.1对尿毒症患者采用低蛋白并补加基本氨基酸的食物进行治疗,分析该疗法对患者体内一些成分的影响。以下数据是在治疗前患者的基本数据[64]:体重(BW)/kg体内总钾(TBK)/mmol血清尿素(UREA)/(mmol·L-1)7331471970364736723266255326502597373834773982366329004954319438663930165334193470397834632747266541814688367841823540396939121991413835622896437434105090367923743855387127
2、5050593583318032684766284645115480465111529038642960457136102469290531计算三者之间的相关系数,并检验相关的显著性。答:所用程序及计算结果如下:optionslinesize=76nodate;datauremia;infile'e:dataer10-1e.dat';inputbwtbkurea@@;run;proccorrnosimple;varbwtbkurea;run;TheSASSystemCorrelationAnalysis3'VAR'Variables:BWTBKUREAPearsonCorrelationC
3、oefficients/Prob>
4、R
5、underHo:Rho=0/N=30BWTBKUREABW1.000000.705940.285820.00.00010.1257TBK0.705941.000000.096610.00010.00.6116UREA0.285820.096611.000000.12570.61160.0三个变量间,只有体重(BW)和体内总钾(TBK)间相关显著,r=0.70594。相关系数的显著性概率P=0.0001。10.2还是上例,经过一年的饮食治疗后,体内总钾量与治疗前的总钾量,如下表[64]:病人号治疗后/mmol治疗前/mmol1632463147223272
6、36472531103266282006265039287929004736203930513597397853308027475634203678382280240054236021055824902530以治疗前为自变量,治疗后为因变量,计算回归方程,并检验回归的显著性。答:计算结果如下:TheSASSystemTheREGProcedureModel:MODEL1DependentVariable:afterAnalysisofVarianceSumofMeanSourceDFSquaresSquareFValuePr>FModel12573589257358939.40<.0001Er
7、ror1065326465326CorrectedTotal113226853RootMSE255.59029R-Square0.7976DependentMean2946.66667AdjR-Sq0.7773CoeffVar8.67388ParameterEstimatesParameterStandardVariableDFEstimateErrortValuePr>
8、t
9、Intercept1560.15163387.316121.450.1787before10.774470.123396.28<.0001回归方程为:t检验的显著性概率P<0.0001。故回归系数极显著。10.3调查河流
10、中悬浮物每月沉淀的量与水流速度的关系,得到以下结果[65]:流量/(m3·min-1)每月上层沉积物/t流量/(m3·min-1)每月主流沉积物/t流量/(m3·min-1)每月下层沉积物/t1651.342546812181.6199030023640.12010730848.62094559902.3162678611269.9671.326832.61834123592.44885993405.2148.755621.41477993325.34715491398.639156598.61080251763.81124041144.624843574.32005371429.789201
11、1126.432939228.4503861404.479615675.49913204.8576081337.684191285.61189188.1309471128.662034174.026416.31826823.187925104.2881655.95239597.4259595.16637947.1367569.12991345.970273.92049741.3136265.822
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