作者hotwanda (走下去)
看板Statistics
標題Re: [問題] 上課老師問的問題.
時間Sun Apr 16 17:24:25 2006
0.03=Z0.975 變異數/把1077開根號
Z0.975=1.96
誤差是0.03
反正把公式套進去...老師要你求變異數吧...
^^
※ 引述《apriLti (聽風的歌)》之銘言：
: 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.
: 題目很短 可是我不懂要題目要我們做什麼
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