Little Monalisa2019-08-08 14:25:42
In this case, the mean difference is 1.4. The sample variance is 36.8. The standard error of the mean difference is 2.712932. The t-statistic is 0.51605. 老师,The standard error of the mean difference is 2.712932,怎么计算出来的,能具体写下步骤么? The standard error of the mean difference is 2.712932,辛苦写下计算步骤。
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Evian, CFA2019-08-08 19:11:17
同学你好,
通过轧差sample A和sample B,可以得到五个数字:7,3,3,3和-9。
将五个数字作为X值输入计算器(视频中有讲过程,2ND+7中操作),可以在2ND+8中得到:均值为1.4,样本标准差为6.06630(样本方差为36.8),总体标注差为5.425864(总体方差为29.44)。
标准误是样本标准差除以(样本容量开方),6.0663/(5^0.5)=2.712932
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