For a certain examination, a score of 58 was 2 standard deviations below the mean, and a score of 98 was 3 standard deviatioon above the mean. What was the mean score for the deviation.
An: 74.
谢谢
作者: lewis 时间: 2008-11-10 07:00
58=M-2D
98=M+3D
作者: hjgjfgfb 时间: 2008-11-11 06:57
非常感谢，我一直不知道这个几个standard deviations是什么意思...
欢迎光临 国际顶尖MBA申请交流平台--TOPWAY MBA (http://forum.topway.org/)
