英语数学题关于假设性检验的A researcher believes that unless youexercise for more than 30 minutes a day then there will be no effect on yourbody weight.The researcher takes a sample of 7 people,each of whom exercisesfor less than 30 minut
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英语数学题关于假设性检验的A researcher believes that unless youexercise for more than 30 minutes a day then there will be no effect on yourbody weight.The researcher takes a sample of 7 people,each of whom exercisesfor less than 30 minut
英语数学题关于假设性检验的
A researcher believes that unless youexercise for more than 30 minutes a day then there will be no effect on yourbody weight.The researcher takes a sample of 7 people,each of whom exercisesfor less than 30 minutes per day and records their weight.
The weights recorded in the sample were:
85,
67,
102,
87,
90,
76,
56
The average weight of males in the Australian populationis 88 kg.
Use the sample to test the hypothesis thatthe mean weight of people who exercise for less than 30 minutes per day is lessthan the Australian average.
英语数学题关于假设性检验的A researcher believes that unless youexercise for more than 30 minutes a day then there will be no effect on yourbody weight.The researcher takes a sample of 7 people,each of whom exercisesfor less than 30 minut
因为方差未知,所以需要进行关于均值u的t检验方法,假设H0：u≤88,H2:u2≥88,在Matlab中输入以下命令可以求x=[85 67 102 87 90 76 56];m=88;h=ttest(x,m,0.05,'right');最后的结果为h= 0,表示在显著性水平为0.05的情况下,不能拒绝原假设.即认为这些锻炼少于30分钟的人的平均体重是小于88kg的
具体的关于t检验法的具体原理,你可以看一下概率论与数理统计,不知道有没有帮到你,如果不清楚还可以问.希望给个赞!
根据题意，每天少于30分钟的体育锻炼，不会对你的体重产生影响，澳大利亚男性的平均体重为88kg，则低于平均体重的有：85kg，67kg，87kg，76kg，56kg。
回答完毕。