統(tǒng)計(jì)學(xué)期末復(fù)習(xí)重點(diǎn)知識

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1、統(tǒng)計(jì)學(xué)期末復(fù)習(xí)?統(tǒng)計(jì)的研究對象的特點(diǎn)：數(shù)量性；總體性；變異性。?日常生活中，“統(tǒng)計(jì)”的3種含義：統(tǒng)計(jì)工作；統(tǒng)計(jì)數(shù)據(jù)；統(tǒng)計(jì)學(xué)。?按分組的作用和任務(wù)不同，分為類型分組、結(jié)構(gòu)分組和分析分組。??相關(guān)系數(shù)的計(jì)算：5.1-9,,services,andmakethecitymoreattractive,strengtheningpublictransportinvestment,establishedasthebackboneoftheurbanrailtransitmulti-level,multi-functionalpublictransportsystem,thusp

2、rotectingtheregionalpositionandachieve計(jì)算相關(guān)系數(shù)的“積差法”簡單線性回歸中估計(jì)的回歸方程為：5.1-9,,services,andmakethecitymoreattractive,strengtheningpublictransportinvestment,establishedasthebackboneoftheurbanrailtransitmulti-level,multi-functionalpublictransportsystem,thusprotectingtheregionalpositionandachie

3、ve估計(jì)標(biāo)準(zhǔn)誤差Sy：由樣本資料計(jì)算：由總體資料計(jì)算或在大樣本情況下：總量指標(biāo)時期數(shù)列的序時平均數(shù)：算術(shù)平均法連續(xù)時點(diǎn)數(shù)列的序時平均數(shù)：算術(shù)平均連續(xù)每天資料不同：5.1-9,,services,andmakethecitymoreattractive,strengtheningpublictransportinvestment,establishedasthebackboneoftheurbanrailtransitmulti-level,multi-functionalpublictransportsystem,thusprotectingtheregionalp

4、ositionandachieve持續(xù)天內(nèi)資料不變：間斷時點(diǎn)數(shù)列的序時平均數(shù)：※間隔相等時，采用首末折半法計(jì)算；間隔不相等時，采用時間間隔長度加權(quán)平均：相對數(shù)數(shù)列(平均數(shù)數(shù)列）序時平均數(shù)：5.1-9,,services,andmakethecitymoreattractive,strengtheningpublictransportinvestment,establishedasthebackboneoftheurbanrailtransitmulti-level,multi-functionalpublictransportsystem,thusprotectin

5、gtheregionalpositionandachieve⑴a、b均為時期數(shù)列時：⑵a、b均為時點(diǎn)數(shù)列時：⑶a為時期數(shù)列、b為時點(diǎn)數(shù)列時：5.1-9,,services,andmakethecitymoreattractive,strengtheningpublictransportinvestment,establishedasthebackboneoftheurbanrailtransitmulti-level,multi-functionalpublictransportsystem,thusprotectingtheregionalpositionanda

6、chieve平均發(fā)展速度為：直線趨勢的測定：最小二乘法:直線趨勢方程：用最小平方法求解參數(shù)a、b，有5.1-9,,services,andmakethecitymoreattractive,strengtheningpublictransportinvestment,establishedasthebackboneoftheurbanrailtransitmulti-level,multi-functionalpublictransportsystem,thusprotectingtheregionalpositionandachieve求解a、b的簡捷方法：取時間

7、數(shù)列中間項(xiàng)為原點(diǎn)?N為奇數(shù)時，令t=…，-3，-2，-1，0，1，2，3，…N為偶數(shù)時，令t=…，-5，-3，-1，1，3，5，…1）直接平均法：5.1-9,,services,andmakethecitymoreattractive,strengtheningpublictransportinvestment,establishedasthebackboneoftheurbanrailtransitmulti-level,multi-functionalpublictransportsystem,thusprotectingtheregionalpositio