MAT161 的题求解答,急!在线等

gyqandy2022-10-04 11:39:541条回答

MAT161 的题求解答,急!在线等
An educational research firm is interested in estimating the mean number of hours per week that all American eighth-graders watch television. Sample 81 students. Average 18.5 hours per week. Standard deviation 9.4hours.
Construct an 80% confidence interval to estimate the mean number of hours per week that all population watch television?

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一个教育研究机构评估每星期所有美国八年级的学生看电视的平均时间
样本为81个学生
平均18.5个小时每星期
标准差9.4小时
构建置信区间80%来估计所有人每周看电视的时间
1年前

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