作者hotwanda (走下去)
看板Statistics
标题Re: [问题] 上课老师问的问题.
时间Sun Apr 16 17:24:25 2006
0.03=Z0.975 变异数/把1077开根号
Z0.975=1.96
误差是0.03
反正把公式套进去...老师要你求变异数吧...
^^
※ 引述《apriLti (听风的歌)》之铭言：
: A sample of 1077 voters from Taipei city is selected and asked
: which of the three mayor candidates he or she may support. At
: 95% confidence, show that the margin of error for the estimated
: proportion is about 0.03.
: 题目很短 可是我不懂要题目要我们做什麽
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