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样本量过少回归分析如何分析处理与解释

2017-03-21 刘重杰 刘重杰

回归是统计学中最常用的模型,但是,有时使用回归后发现结果难以解释,或者与临床实际并不符合,十分困惑。这可能是什么原因呢? 虽然,实际原因很多,但是重要原因之一是样本量太小!很小小样本得出回归的结果,其实并不"回 归",因此,在处理小样本做多因素回归分析时,要慎重。传统一般认为在logistic回归时,变量与样本量之比为至少5倍,即纳入5个变量时,样本量至少也需要25例,实际上,这是保守估计。如果

回归是统计学中最常用的模型,但是,有时使用回归后发现结果难以解释,或者与临床实际并不符合,十分困惑。这可能是什么原因呢? 虽然,实际原因很多,但是重要原因之一是样本量太小!很小小样本得出回归的结果,其实并不"回 归",因此,在处理小样本做多因素回归分析时,要慎重。传统一般认为在logistic回归时,变量与样本量之比为至少5倍,即纳入5个变量时,样本量至少也需要25例,实际上,这是保守估计。如果每个变量能超过40例样本时,回归的结果往往是不错的。 谈到回归,要讲其核心---最小二乘法(OLS)。 学会OLS,有人还明白了ML等方法的含义;现在学统计分析的时候,或多或少会安排统计软件的实践课程,于是大家学会了使用Excel,乃至SAS中如何来做经典的回归分析。看过不少的文献,很多都忽略了回归分析模型诊断这个环节——可能很多标准教科书没有强调,甚至是没有讲;这不能不说是一个遗憾。 回归分析使用最广泛,误用的情况也多了些。下面使用一个经典的例子,来“恶心”一下那些“过分钟爱”经典回归分析的人——我在很多课堂上都举过这个例子(Anscombe),作为从基础课程向中级乃至高级课程的开场白。上面有

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  1. 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encryptionId=c56c4051902, topicName=回归分析)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=a46f26833520, createdName=cenghis, createdTime=Wed Jan 17 16:28:00 CST 2018, time=2018-01-17, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=187768, encodeId=1a9118e7688b, content=还行吧,加油。。。, beContent=null, objectType=article, channel=null, level=null, likeNumber=157, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=/v1.0.0/img/user_icon.png, createdBy=2cc41668195, createdName=ffaadd, createdTime=Sun Apr 16 00:09:41 CST 2017, time=2017-04-16, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=185210, encodeId=a0e3185210c6, content=学习,以前没注意到, beContent=null, objectType=article, channel=null, level=null, likeNumber=170, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/mONcle9pic3xjZ9qh3bhXrJtUlmycKGfQKPuADVZQsdNAQj5IrHHlzbGsDwScictBgogYRk8KhicpgEKwTEfOHgqw/0, createdBy=bc931611963, createdName=jin321, createdTime=Wed Apr 05 00:08:28 CST 2017, time=2017-04-05, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=184355, encodeId=c1201843552d, content=前提条件很重要, beContent=null, objectType=article, channel=null, level=null, likeNumber=134, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=d0df2042273, createdName=小驹, createdTime=Sat Apr 01 19:44:21 CST 2017, time=2017-04-01, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=184060, encodeId=04b71840603b, content=不错,学习了!, beContent=null, objectType=article, channel=null, level=null, likeNumber=83, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://thirdwx.qlogo.cn/mmopen/vi_32/DYAIOgq83epr1MZHfgreGEFrpiapjCGIQGZhkpjicialc8h7VoU0AjNiaSgpaZjNuIqq1KVbmI19JwrN2sdwTdWVSw/132, createdBy=f6692009961, createdName=sy3923582, createdTime=Fri Mar 31 17:21:25 CST 2017, time=2017-03-31, status=1, ipAttribution=)]
    2023-02-03 ms1000001302635629 来自甘肃省

    想学习一下,这个太需要了

    0

  2. 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encryptionId=c56c4051902, topicName=回归分析)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=a46f26833520, createdName=cenghis, createdTime=Wed Jan 17 16:28:00 CST 2018, time=2018-01-17, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=187768, encodeId=1a9118e7688b, content=还行吧,加油。。。, beContent=null, objectType=article, channel=null, level=null, likeNumber=157, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=/v1.0.0/img/user_icon.png, createdBy=2cc41668195, createdName=ffaadd, createdTime=Sun Apr 16 00:09:41 CST 2017, time=2017-04-16, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=185210, encodeId=a0e3185210c6, content=学习,以前没注意到, beContent=null, objectType=article, channel=null, level=null, likeNumber=170, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, 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createdAvatar=http://thirdwx.qlogo.cn/mmopen/vi_32/DYAIOgq83epr1MZHfgreGEFrpiapjCGIQGZhkpjicialc8h7VoU0AjNiaSgpaZjNuIqq1KVbmI19JwrN2sdwTdWVSw/132, createdBy=f6692009961, createdName=sy3923582, createdTime=Fri Mar 31 17:21:25 CST 2017, time=2017-03-31, status=1, ipAttribution=)]
    2022-12-03 ms9000000477503919

    数完对点是什么意思

    0

  3. 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createdAvatar=http://thirdwx.qlogo.cn/mmopen/vi_32/DYAIOgq83epr1MZHfgreGEFrpiapjCGIQGZhkpjicialc8h7VoU0AjNiaSgpaZjNuIqq1KVbmI19JwrN2sdwTdWVSw/132, createdBy=f6692009961, createdName=sy3923582, createdTime=Fri Mar 31 17:21:25 CST 2017, time=2017-03-31, status=1, ipAttribution=)]
    2017-10-18 zhzhxiang
  4. 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createdName=1e0d2fb7m34(暂无匿称), createdTime=Thu Jun 08 14:58:52 CST 2017, time=2017-06-08, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=197859, encodeId=6cb119e85956, content=这个板块太好了,对学习非常有用。, beContent=null, objectType=article, channel=null, level=null, likeNumber=132, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/oLAjfB7s1ib06iaV3D9Tg5Kzuf9u71gZhPYMiajRtENwicoAABeQtfXOlic8ibhYSy6DvJZWUDVtjRvTfqBffr1XJ6JLtFB5kHicthl/0, createdBy=d41c2055892, createdName=184****9840, createdTime=Sun May 14 07:59:43 CST 2017, time=2017-05-14, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1671697, encodeId=63f316e1697c3, content=<a href='/topic/show?id=c56c4051902' target=_blank style='color:#2F92EE;'>#回归分析#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=62, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=40519, encryptionId=c56c4051902, topicName=回归分析)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=a46f26833520, createdName=cenghis, createdTime=Wed Jan 17 16:28:00 CST 2018, time=2018-01-17, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=187768, encodeId=1a9118e7688b, content=还行吧,加油。。。, beContent=null, objectType=article, channel=null, level=null, likeNumber=157, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=/v1.0.0/img/user_icon.png, createdBy=2cc41668195, createdName=ffaadd, createdTime=Sun Apr 16 00:09:41 CST 2017, time=2017-04-16, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=185210, encodeId=a0e3185210c6, content=学习,以前没注意到, beContent=null, objectType=article, channel=null, level=null, likeNumber=170, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/mONcle9pic3xjZ9qh3bhXrJtUlmycKGfQKPuADVZQsdNAQj5IrHHlzbGsDwScictBgogYRk8KhicpgEKwTEfOHgqw/0, createdBy=bc931611963, createdName=jin321, createdTime=Wed Apr 05 00:08:28 CST 2017, time=2017-04-05, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=184355, encodeId=c1201843552d, content=前提条件很重要, beContent=null, objectType=article, channel=null, level=null, likeNumber=134, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=d0df2042273, createdName=小驹, createdTime=Sat Apr 01 19:44:21 CST 2017, time=2017-04-01, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=184060, encodeId=04b71840603b, content=不错,学习了!, beContent=null, objectType=article, channel=null, level=null, likeNumber=83, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://thirdwx.qlogo.cn/mmopen/vi_32/DYAIOgq83epr1MZHfgreGEFrpiapjCGIQGZhkpjicialc8h7VoU0AjNiaSgpaZjNuIqq1KVbmI19JwrN2sdwTdWVSw/132, createdBy=f6692009961, createdName=sy3923582, createdTime=Fri Mar 31 17:21:25 CST 2017, time=2017-03-31, status=1, ipAttribution=)]
    2017-06-08 1e0d2fb7m34(暂无匿称)

    学习了,非常感谢!

    0

  5. 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GetPortalCommentsPageByObjectIdResponse(id=1669358, encodeId=e8891669358dc, content=<a href='/topic/show?id=9d7b620395d' target=_blank style='color:#2F92EE;'>#样本#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=65, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=62039, encryptionId=9d7b620395d, topicName=样本)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=f33226554040, createdName=zhzhxiang, createdTime=Wed Oct 18 05:28:00 CST 2017, time=2017-10-18, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=208179, encodeId=ecff2081e9f9, content=学习了,非常感谢!, beContent=null, objectType=article, channel=null, level=null, likeNumber=183, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/NUyjXTCJjo6KcicAVC1MwuEYA6ZJS2RZEJp0LgvdXH072EszfvD8xib0UGViaFO626UZIkB4ibvY1NicVJDFUSYoQjZvL6gnjziaYl/0, createdBy=48511932758, 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encryptionId=c56c4051902, topicName=回归分析)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=a46f26833520, createdName=cenghis, createdTime=Wed Jan 17 16:28:00 CST 2018, time=2018-01-17, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=187768, encodeId=1a9118e7688b, content=还行吧,加油。。。, beContent=null, objectType=article, channel=null, level=null, likeNumber=157, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=/v1.0.0/img/user_icon.png, createdBy=2cc41668195, createdName=ffaadd, createdTime=Sun Apr 16 00:09:41 CST 2017, time=2017-04-16, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=185210, encodeId=a0e3185210c6, content=学习,以前没注意到, beContent=null, objectType=article, channel=null, level=null, likeNumber=170, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/mONcle9pic3xjZ9qh3bhXrJtUlmycKGfQKPuADVZQsdNAQj5IrHHlzbGsDwScictBgogYRk8KhicpgEKwTEfOHgqw/0, createdBy=bc931611963, createdName=jin321, createdTime=Wed Apr 05 00:08:28 CST 2017, time=2017-04-05, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=184355, encodeId=c1201843552d, content=前提条件很重要, beContent=null, objectType=article, channel=null, level=null, likeNumber=134, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=d0df2042273, createdName=小驹, createdTime=Sat Apr 01 19:44:21 CST 2017, time=2017-04-01, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=184060, encodeId=04b71840603b, content=不错,学习了!, beContent=null, objectType=article, channel=null, level=null, likeNumber=83, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://thirdwx.qlogo.cn/mmopen/vi_32/DYAIOgq83epr1MZHfgreGEFrpiapjCGIQGZhkpjicialc8h7VoU0AjNiaSgpaZjNuIqq1KVbmI19JwrN2sdwTdWVSw/132, createdBy=f6692009961, createdName=sy3923582, createdTime=Fri Mar 31 17:21:25 CST 2017, time=2017-03-31, status=1, ipAttribution=)]
    2017-05-14 184****9840

    这个板块太好了,对学习非常有用。

    0

  6. 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encryptionId=c56c4051902, topicName=回归分析)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=a46f26833520, createdName=cenghis, createdTime=Wed Jan 17 16:28:00 CST 2018, time=2018-01-17, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=187768, encodeId=1a9118e7688b, content=还行吧,加油。。。, beContent=null, objectType=article, channel=null, level=null, likeNumber=157, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=/v1.0.0/img/user_icon.png, createdBy=2cc41668195, createdName=ffaadd, createdTime=Sun Apr 16 00:09:41 CST 2017, time=2017-04-16, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=185210, encodeId=a0e3185210c6, content=学习,以前没注意到, beContent=null, objectType=article, channel=null, level=null, likeNumber=170, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/mONcle9pic3xjZ9qh3bhXrJtUlmycKGfQKPuADVZQsdNAQj5IrHHlzbGsDwScictBgogYRk8KhicpgEKwTEfOHgqw/0, createdBy=bc931611963, createdName=jin321, createdTime=Wed Apr 05 00:08:28 CST 2017, time=2017-04-05, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=184355, encodeId=c1201843552d, content=前提条件很重要, beContent=null, objectType=article, channel=null, level=null, likeNumber=134, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=d0df2042273, createdName=小驹, createdTime=Sat Apr 01 19:44:21 CST 2017, time=2017-04-01, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=184060, encodeId=04b71840603b, content=不错,学习了!, beContent=null, objectType=article, channel=null, level=null, likeNumber=83, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://thirdwx.qlogo.cn/mmopen/vi_32/DYAIOgq83epr1MZHfgreGEFrpiapjCGIQGZhkpjicialc8h7VoU0AjNiaSgpaZjNuIqq1KVbmI19JwrN2sdwTdWVSw/132, createdBy=f6692009961, createdName=sy3923582, createdTime=Fri Mar 31 17:21:25 CST 2017, time=2017-03-31, status=1, ipAttribution=)]
  7. 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encryptionId=c56c4051902, topicName=回归分析)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=a46f26833520, createdName=cenghis, createdTime=Wed Jan 17 16:28:00 CST 2018, time=2018-01-17, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=187768, encodeId=1a9118e7688b, content=还行吧,加油。。。, beContent=null, objectType=article, channel=null, level=null, likeNumber=157, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=/v1.0.0/img/user_icon.png, createdBy=2cc41668195, createdName=ffaadd, createdTime=Sun Apr 16 00:09:41 CST 2017, time=2017-04-16, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=185210, encodeId=a0e3185210c6, content=学习,以前没注意到, beContent=null, objectType=article, channel=null, level=null, likeNumber=170, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/mONcle9pic3xjZ9qh3bhXrJtUlmycKGfQKPuADVZQsdNAQj5IrHHlzbGsDwScictBgogYRk8KhicpgEKwTEfOHgqw/0, createdBy=bc931611963, createdName=jin321, createdTime=Wed Apr 05 00:08:28 CST 2017, time=2017-04-05, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=184355, encodeId=c1201843552d, content=前提条件很重要, beContent=null, objectType=article, channel=null, level=null, likeNumber=134, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=d0df2042273, createdName=小驹, createdTime=Sat Apr 01 19:44:21 CST 2017, time=2017-04-01, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=184060, encodeId=04b71840603b, content=不错,学习了!, beContent=null, objectType=article, channel=null, level=null, likeNumber=83, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://thirdwx.qlogo.cn/mmopen/vi_32/DYAIOgq83epr1MZHfgreGEFrpiapjCGIQGZhkpjicialc8h7VoU0AjNiaSgpaZjNuIqq1KVbmI19JwrN2sdwTdWVSw/132, createdBy=f6692009961, createdName=sy3923582, createdTime=Fri Mar 31 17:21:25 CST 2017, time=2017-03-31, status=1, ipAttribution=)]
    2017-04-16 ffaadd

    还行吧,加油。。。

    0

  8. [GetPortalCommentsPageByObjectIdResponse(id=2112938, encodeId=c32b2112938b0, content=想学习一下,这个太需要了, beContent=null, objectType=article, channel=null, level=null, likeNumber=68, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://img.medsci.cn/20210616/bbe26bc5ca1f4969ac010ec7de5f0c27/4e803d694080488693be6357a24a47f6.jpg, createdBy=9a365417502, createdName=ms1000001302635629, createdTime=Fri Feb 03 22:39:35 CST 2023, time=2023-02-03, status=1, ipAttribution=甘肃省), GetPortalCommentsPageByObjectIdResponse(id=2104148, encodeId=9d822104148f2, content=数完对点是什么意思, beContent=null, objectType=article, channel=null, level=null, likeNumber=111, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=3c928463092, createdName=ms9000000477503919, createdTime=Sat Dec 03 21:52:15 CST 2022, time=2022-12-03, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1669358, encodeId=e8891669358dc, content=<a href='/topic/show?id=9d7b620395d' target=_blank style='color:#2F92EE;'>#样本#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=65, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=62039, encryptionId=9d7b620395d, topicName=样本)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=f33226554040, createdName=zhzhxiang, createdTime=Wed Oct 18 05:28:00 CST 2017, time=2017-10-18, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=208179, encodeId=ecff2081e9f9, content=学习了,非常感谢!, beContent=null, objectType=article, channel=null, level=null, likeNumber=183, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/NUyjXTCJjo6KcicAVC1MwuEYA6ZJS2RZEJp0LgvdXH072EszfvD8xib0UGViaFO626UZIkB4ibvY1NicVJDFUSYoQjZvL6gnjziaYl/0, createdBy=48511932758, createdName=1e0d2fb7m34(暂无匿称), createdTime=Thu Jun 08 14:58:52 CST 2017, time=2017-06-08, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=197859, encodeId=6cb119e85956, content=这个板块太好了,对学习非常有用。, beContent=null, objectType=article, channel=null, level=null, likeNumber=132, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/oLAjfB7s1ib06iaV3D9Tg5Kzuf9u71gZhPYMiajRtENwicoAABeQtfXOlic8ibhYSy6DvJZWUDVtjRvTfqBffr1XJ6JLtFB5kHicthl/0, createdBy=d41c2055892, createdName=184****9840, createdTime=Sun May 14 07:59:43 CST 2017, time=2017-05-14, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1671697, encodeId=63f316e1697c3, content=<a href='/topic/show?id=c56c4051902' target=_blank style='color:#2F92EE;'>#回归分析#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=62, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=40519, encryptionId=c56c4051902, topicName=回归分析)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=a46f26833520, createdName=cenghis, createdTime=Wed Jan 17 16:28:00 CST 2018, time=2018-01-17, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=187768, encodeId=1a9118e7688b, content=还行吧,加油。。。, beContent=null, objectType=article, channel=null, level=null, likeNumber=157, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=/v1.0.0/img/user_icon.png, createdBy=2cc41668195, createdName=ffaadd, createdTime=Sun Apr 16 00:09:41 CST 2017, time=2017-04-16, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=185210, encodeId=a0e3185210c6, content=学习,以前没注意到, beContent=null, objectType=article, channel=null, level=null, likeNumber=170, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/mONcle9pic3xjZ9qh3bhXrJtUlmycKGfQKPuADVZQsdNAQj5IrHHlzbGsDwScictBgogYRk8KhicpgEKwTEfOHgqw/0, createdBy=bc931611963, createdName=jin321, createdTime=Wed Apr 05 00:08:28 CST 2017, time=2017-04-05, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=184355, encodeId=c1201843552d, content=前提条件很重要, beContent=null, objectType=article, channel=null, level=null, likeNumber=134, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=d0df2042273, createdName=小驹, createdTime=Sat Apr 01 19:44:21 CST 2017, time=2017-04-01, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=184060, encodeId=04b71840603b, content=不错,学习了!, beContent=null, objectType=article, channel=null, level=null, likeNumber=83, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://thirdwx.qlogo.cn/mmopen/vi_32/DYAIOgq83epr1MZHfgreGEFrpiapjCGIQGZhkpjicialc8h7VoU0AjNiaSgpaZjNuIqq1KVbmI19JwrN2sdwTdWVSw/132, createdBy=f6692009961, createdName=sy3923582, createdTime=Fri Mar 31 17:21:25 CST 2017, time=2017-03-31, status=1, ipAttribution=)]
    2017-04-05 jin321

    学习,以前没注意到

    0

  9. [GetPortalCommentsPageByObjectIdResponse(id=2112938, encodeId=c32b2112938b0, content=想学习一下,这个太需要了, beContent=null, objectType=article, channel=null, level=null, likeNumber=68, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://img.medsci.cn/20210616/bbe26bc5ca1f4969ac010ec7de5f0c27/4e803d694080488693be6357a24a47f6.jpg, createdBy=9a365417502, createdName=ms1000001302635629, createdTime=Fri Feb 03 22:39:35 CST 2023, time=2023-02-03, status=1, ipAttribution=甘肃省), GetPortalCommentsPageByObjectIdResponse(id=2104148, encodeId=9d822104148f2, content=数完对点是什么意思, beContent=null, objectType=article, channel=null, level=null, likeNumber=111, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=3c928463092, createdName=ms9000000477503919, createdTime=Sat Dec 03 21:52:15 CST 2022, time=2022-12-03, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1669358, encodeId=e8891669358dc, content=<a href='/topic/show?id=9d7b620395d' target=_blank style='color:#2F92EE;'>#样本#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=65, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=62039, encryptionId=9d7b620395d, topicName=样本)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=f33226554040, createdName=zhzhxiang, createdTime=Wed Oct 18 05:28:00 CST 2017, time=2017-10-18, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=208179, encodeId=ecff2081e9f9, content=学习了,非常感谢!, beContent=null, objectType=article, channel=null, level=null, likeNumber=183, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/NUyjXTCJjo6KcicAVC1MwuEYA6ZJS2RZEJp0LgvdXH072EszfvD8xib0UGViaFO626UZIkB4ibvY1NicVJDFUSYoQjZvL6gnjziaYl/0, createdBy=48511932758, 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encryptionId=c56c4051902, topicName=回归分析)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=a46f26833520, createdName=cenghis, createdTime=Wed Jan 17 16:28:00 CST 2018, time=2018-01-17, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=187768, encodeId=1a9118e7688b, content=还行吧,加油。。。, beContent=null, objectType=article, channel=null, level=null, likeNumber=157, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=/v1.0.0/img/user_icon.png, createdBy=2cc41668195, createdName=ffaadd, createdTime=Sun Apr 16 00:09:41 CST 2017, time=2017-04-16, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=185210, encodeId=a0e3185210c6, content=学习,以前没注意到, beContent=null, objectType=article, channel=null, level=null, likeNumber=170, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/mONcle9pic3xjZ9qh3bhXrJtUlmycKGfQKPuADVZQsdNAQj5IrHHlzbGsDwScictBgogYRk8KhicpgEKwTEfOHgqw/0, createdBy=bc931611963, createdName=jin321, createdTime=Wed Apr 05 00:08:28 CST 2017, time=2017-04-05, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=184355, encodeId=c1201843552d, content=前提条件很重要, beContent=null, objectType=article, channel=null, level=null, likeNumber=134, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=d0df2042273, createdName=小驹, createdTime=Sat Apr 01 19:44:21 CST 2017, time=2017-04-01, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=184060, encodeId=04b71840603b, content=不错,学习了!, beContent=null, objectType=article, channel=null, level=null, likeNumber=83, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://thirdwx.qlogo.cn/mmopen/vi_32/DYAIOgq83epr1MZHfgreGEFrpiapjCGIQGZhkpjicialc8h7VoU0AjNiaSgpaZjNuIqq1KVbmI19JwrN2sdwTdWVSw/132, createdBy=f6692009961, createdName=sy3923582, createdTime=Fri Mar 31 17:21:25 CST 2017, time=2017-03-31, status=1, ipAttribution=)]
    2017-04-01 小驹

    前提条件很重要

    0

  10. 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encryptionId=c56c4051902, topicName=回归分析)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=a46f26833520, createdName=cenghis, createdTime=Wed Jan 17 16:28:00 CST 2018, time=2018-01-17, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=187768, encodeId=1a9118e7688b, content=还行吧,加油。。。, beContent=null, objectType=article, channel=null, level=null, likeNumber=157, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=/v1.0.0/img/user_icon.png, createdBy=2cc41668195, createdName=ffaadd, createdTime=Sun Apr 16 00:09:41 CST 2017, time=2017-04-16, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=185210, encodeId=a0e3185210c6, content=学习,以前没注意到, beContent=null, objectType=article, channel=null, level=null, likeNumber=170, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/mONcle9pic3xjZ9qh3bhXrJtUlmycKGfQKPuADVZQsdNAQj5IrHHlzbGsDwScictBgogYRk8KhicpgEKwTEfOHgqw/0, createdBy=bc931611963, createdName=jin321, createdTime=Wed Apr 05 00:08:28 CST 2017, time=2017-04-05, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=184355, encodeId=c1201843552d, content=前提条件很重要, beContent=null, objectType=article, channel=null, level=null, likeNumber=134, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=d0df2042273, createdName=小驹, createdTime=Sat Apr 01 19:44:21 CST 2017, time=2017-04-01, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=184060, encodeId=04b71840603b, content=不错,学习了!, beContent=null, objectType=article, channel=null, level=null, likeNumber=83, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://thirdwx.qlogo.cn/mmopen/vi_32/DYAIOgq83epr1MZHfgreGEFrpiapjCGIQGZhkpjicialc8h7VoU0AjNiaSgpaZjNuIqq1KVbmI19JwrN2sdwTdWVSw/132, createdBy=f6692009961, createdName=sy3923582, createdTime=Fri Mar 31 17:21:25 CST 2017, time=2017-03-31, status=1, ipAttribution=)]
    2017-03-31 sy3923582

    不错,学习了!

    0

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分层回归(hierarchical multiple regression),也称层次回归,其实是对两个或多个回归模型进行比较。我们可以根据两个模型所解释的变异量的差异来比较所建立的两个模型。一个模型解释了越多的变异,则它对数据的拟合就越好。假如在其他条件相等的情况下,一个模型比另一个模型解释了更多的变异,则这个模型是一个更好的模型。两个模型所解释的变异量之间的差异可以用统计显著性来估计和检验

用局部加权回归散点平滑法(LOWESS)观察二维变量之间的关系

二维变量之间的关系研究是很多统计方法的基础,例如回归分析通常会从一元回归讲起,然后再扩展到多元情况。局部加权回归散点平滑法(locally weighted scatterplot smoothing,LOWESS或LOESS)是查看二维变量之间关系的一种有力工具。 LOWESS主要思想是取一定比例的局部数据,在这部分子集中拟合多项式回归曲线,这样我们便可以观察到数据在局部展现出来的规律和趋势;

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