作业帮求一位统计大神帮我解个题,一点思路都没有
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求一位统计大神帮我解个题,一点思路都没有
The attached file has either 1 or 0 entries for over 160 students and
across 14 classes.It is 1 if a student is called her/his name in a class and 0
otherwise.
Please test if each student is called his/her name with probability 0.2
(i.e.,20%) independently across students and classes,at 5% significance
level.
Do not assume that there is a unique solution.
那个表大概就是这样的
The attached file has either 1 or 0 entries for over 160 students and
across 14 classes.It is 1 if a student is called her/his name in a class and 0
otherwise.
Please test if each student is called his/her name with probability 0.2
(i.e.,20%) independently across students and classes,at 5% significance
level.
Do not assume that there is a unique solution.
那个表大概就是这样的
你好：本题分析如下这是0-1分布B(1,p)关于未知参数p的假设检验问题；已知n=160,根据图表计算出 所有取值为1 的个数,(EXCEl 中计算)为 ∑X 的值,因为是大样本（160）,∑X近似服从正态分布N(np,np(1-p))样本均值Xba服从N(p,p(1-p)/n)到此为止,准备工作完了!假设检验 H0: p = 0.2, H1: p != 0.2 α=0.05U 为检验量 服从标准正态分布
你自己算吧,只要最后结果大于1.96 就是原假设不成立,p不等于0.2
你自己算吧,只要最后结果大于1.96 就是原假设不成立,p不等于0.2