[機統] 標準差 信賴區間
題目是
In a simple random sample of 1500 voters 55% planned to vote for a particular
prop and 45% planned to vote against it.
" The estimated margin of victory for the prop is thus 10%. "
What is the standard error of this estimated margin?
what is an approximate 95% confidence interval for the margin?
想問中間那句" "是什麼意思!!!!!!
順便問一下題目想要用的公式是?
謝謝
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