定量變量的統(tǒng)計(jì)描述教學(xué)課件

第二章定量變量的統(tǒng)計(jì)描迷衛(wèi)針學(xué)(第七版)統(tǒng)計(jì)圖表定量變量的統(tǒng)計(jì)描述統(tǒng)計(jì)指標(biāo):(集中趨勢(shì)指標(biāo)離散趨勢(shì)指標(biāo)利用統(tǒng)計(jì)表對(duì)數(shù)據(jù)進(jìn)行概括,用統(tǒng)計(jì)圖對(duì)分布形態(tài)及分布間的關(guān)系做直觀(guān)的表達(dá),用于描述定量資料的統(tǒng)計(jì)指標(biāo)的意義與計(jì)算。(教學(xué)內(nèi)容】一、頻率分布表與頻率分布圖Frequency/Frequencydistribution)二、描述平均水平統(tǒng)計(jì)指標(biāo)Descriptionofcentraltendency)三、描述變異程度統(tǒng)計(jì)指標(biāo)Descriptionoftendencyofdispersion)教學(xué)內(nèi)容】四、描述分布形態(tài)統(tǒng)計(jì)指標(biāo)Descriptionofdistribution五、統(tǒng)計(jì)表與統(tǒng)計(jì)圖(statisticaltable,statisticchart)統(tǒng)計(jì)學(xué)→隨機(jī)性現(xiàn)象概率論數(shù)理統(tǒng)計(jì)衛(wèi)生統(tǒng)計(jì)學(xué)變量/→[定量變量「研統(tǒng)計(jì)描述內(nèi)定性變量|容/統(tǒng)計(jì)推斷統(tǒng)計(jì)描述:從資料中獲取信息最基本的方法■把握資料基本的特征■為統(tǒng)計(jì)分析打下基礎(chǔ)表2-2120名18-35歲健康男性居民血清鐵含量(umol/L)7.428.6523.0221.6121.3121.469.9722.7314.9420.1821.6223.0720.388.417.3229.6419.6921.6923.917.4519.0820.5224.1423.77183623.0424.2224.1321.5311.0918.8918.2623.2917.6715.3818.6114.2717.422.5517.5516.117.9820.132114.5619.8919.8217.4814.8918.3719.517.0818.1226.0211.3413.8110.2515.9415.8318.5424.5219.2626.1316.9918.8918.4620.8717.5113.1211.7517.421.3617.1413.7712.520.420.319.3823.1112.6723.0224.3625.6119.5314.7714.3724.7512.7317.2519.0916.7917.1919.3219.5919.1215.3121.7519.4715.5110.8627.8121.6516.3220.7522.1113.1717.5519.2612.6518.4819.8323.1219.2219.2216.7227.911.7424.6614.1816.52目的:描述該組18-35歲健康男性居民血清鐵含量的分布規(guī)律問(wèn)題1該組居民血清鐵含量平均值多少?集中趨勢(shì)問(wèn)題2血清鐵含量范圍?最高多少?最低…多少?感散趨勢(shì)問(wèn)題3血清鐵含量主要集中在哪個(gè)范圍2頻數(shù)表問(wèn)題4用表/圖表示血清鐵分布?…頻數(shù)分布圖影IMaTE第一節(jié)頻數(shù)與頻數(shù)分布、連續(xù)型定量變量的頻數(shù)分布頻數(shù)表的編制頻數(shù)(frequency):對(duì)一個(gè)隨機(jī)變量做重復(fù)觀(guān)察,其中某變量值出現(xiàn)的次數(shù)頻數(shù)分布表(frequencydistributiontable):將各變量值及其相應(yīng)的頻數(shù)列成表格的形式。例22抽樣調(diào)查某地120名18歲~