资源描述
,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,.,*,实验1 描述统计,Descriptive Statistics,11/10/2024,1,.,离散变量描述统计,Descriptive,Statistics on,Discrete,Variable Samples,实验1,描述统计,11/10/2024,2,.,实验1,描述统计,(1),离散变量样本,在某汽修厂观测每天送修的汽车数,X,,连续观测,30,天获得一个样本如下:,1,4,1,5,4,2,3,2,4,3,2,1,2,3,2,2,0,1,2,2,3,1,2,3,2,1,0,2,3,1,11/10/2024,3,.,由给定的样本统计频数分布、累积频数、频率和累积频率,以三线表样式制作频数频率分布表;,基于观测计算样本的均值、方差、标准差、标准误、变异系数;,基于频数计算样本的均值、方差、标准差、标准误、变异系数;,绘制样本的频数分布柱形图,(2),实验任务,实验1,描述统计,11/10/2024,4,.,x,n,(,x,),c,n,(,x,),f,n,(,x,),c,f,(,x,),0,2,2,0.0667,0.0667,1,7,9,0.2333,0.3000,2,11,20,0.3667,0.6667,3,6,26,0.2000,0.8667,4,3,29,0.1000,0.9667,5,1,30,0.0333,1.0000,实验1,描述统计,(3),频数频率分布表,送修汽车数频数频率统计表,11/10/2024,5,.,实验1,描述统计,(4),频数分布柱形图,11/10/2024,6,.,实验1,描述统计,(5),基于频数的样本统计量计算,11/10/2024,7,.,实验1,描述统计,(5),基于频数的样本统计量计算,11/10/2024,8,.,N 30,Minimum 0,Maximum 5.0000,Mean 2.1333,Variance 1.4299,Std Dev 1.1958,Std Error 0.2183,Coeff Variation 56.0521,实验1,描述统计,参考答案,(5),基于频数的样本统计量计算,11/10/2024,9,.,连续变量描述统计,Descriptive,Statistics on,Continuous,Variable Samples,实验1,描述统计,11/10/2024,10,.,(1)连续变量样本,实验1,描述统计,21,20,19,16,23,19,35,25,32,22,23,34,35,24,37,27,26,41,33,31,27,19,23,38,7,18,22,25,9,28,某企业加工了一批孔径,75,的,轴套,现从中随机抽取,30,个进行检验,测得,75,孔径的加工偏差(单位:,m,)样本如下:,若规定孔径,75,的公差带为,H8,,问抽样的轴套是否合格,?,11/10/2024,11,.,样本分组:确定分组数,k,、组距,I,、第,1,组组下限;进而确定各个组的组限和组中值;,统计组频数,计算累积频数、频率和累积频率,以三线表样式完成频数频率分布表;,基于观测计算样本的均值、方差、标准差、标准误和变异系数;,基于频数计算样本的均值、方差、标准差、标准误和变异系数;,绘制频数分布直方图,(2),实验任务,实验1,描述统计,11/10/2024,12,.,(3),频数频率统计表,组序,组区间,组中值,频数,累积频数,频率,累积频率,1,(-,11,7,2,2,0.0667,0.0667,2,(11,19,15,5,7,0.1667,0.2334,3,(19,27,23,13,20,0.4333,0.6667,4,(27,35,31,7,27,0.2333,0.9000,7,(35,+),39,3,30,0.1000,1.0000,75,轴径加工偏差频数频率分布表,实验1,描述统计,11/10/2024,13,.,(4),频数分布直方图,实验1,描述统计,11/10/2024,14,.,实验1,描述统计,(5),基于观测的样本统计量计算,11/10/2024,15,.,实验1,描述统计,(5),基于观测的样本统计量计算,11/10/2024,16,.,N 30,Minimum 7.0000,Maximum 41.0000,Mean 25.3000,Variance 65.6655,Std Dev 8.1034,Std Error 1.4795,Coeff Variation 32.0294,实验1,描述统计,参考答案,(5),基于观测的样本统计量计算,11/10/2024,17,.,实验1,描述统计,(6),基于频数的样本统计量计算,11/10/2024,18,.,实验1,描述统计,(6),基于频数的样本统计量计算,11/10/2024,19,.,N 30,Minimum 7.0000,Maximum 41.0000,Mean 24.0667,Variance 69.4437,Std Dev 8.3333,Std Error 1.5214,Coeff Variation 34.6258,实验1,描述统计,参考答案,(6),基于频数的样本统计量计算,11/10/2024,20,.,结束,实验1,描述统计,11/10/2024,21,.,
展开阅读全文