第02章作业-资料描述性统计

第二章 资料描述性统计1.以下是某呼吸科医生收集的100例肺挫伤（PC）病人临床资料。（1）已知Age、SBP服从正态分布，ISS、PC%、Tx不服从正态分布，请辨别各指标属于哪一种统计资料类型，并说明应选择何种描述性统计指标对其进行描述性分析。（不必计算）（2）请编制指标ISS的频数表，并在频数表上计算算术均数、中位数、标准差和四分位数间距。比较算数均数和中位数，说明那一个指标比较适合描述平均水平？NoAgeSBP收缩压（mmHg）ISS：损伤评分PC%肺损伤容量 InfectionTx第1个24h需要输血量（U）ARDS1688252334yes27470483610yes36510217181No44862525011No5329026222No671843229yes3yes76711218220No86612417170No9691081916yes0yes106562483310yes11708437222yes12769036232yes13667642423yes14677848463yes156412016170No167113018160No17707636223yes18677454383yes1979218162No201710217180No211964512211No222356623312yes23247651423yes24248428212No25289625222No263214017160No273312019180No28477427212No294132422113No304148643914yes31429832212No323807550yes16yes333748644814yes3436745639yes12yes353511218180No362810817221No37299627222No383111218230No393364382410yes40376855484yes413922643614yes42459828222No43469631212No44477228222No454965565010yes465110217160No475311218180No485513026160No495746633810yes50567254428yes51598452483yes52479832222No534950483211yes544815018160No553564463810yes562654382812yes57329841331yes583414218160No593664282112No60179827221No61357429232No623264512210No63219828211No644610418180No65288638242yes66279646382yes673510418171No68548631184No69539826173No701242522113No71179631223No72318230213No734110629211No744636624113yes753710628231No763548483314yes77289530222No78279628222No79219631222No80197646363yes81299231163No823311416190No833510228220No846011618160No856213426160No86478628222No87499427211No88349827161No893610829160No903112829210No91219428201No922210225160No933310426201No94469631202No95189418211No962711026160No972510428220No982410217161No99339818162No1003412217160No说明：Age：年龄（岁） ISS：损伤评分 SBP（mmHg）：收缩压（mmHg）PC（%）：肺损伤容量 24hTx：第1个24h需要输血量（U） ARDS：是否发生急性呼吸窘迫综合征 3.下表为10例垂体催乳素微腺瘤病人手术前后的血催乳素浓度，请说明用何种指标比较手术前后数据的变异情况较为合适，并计算之。手术前后患者血催乳素浓度病例号血催乳素浓度(ng/ml)术前术后1276428801103160028043246153981056266437500258176030095002151022092