[機統] 一題區間估計相關問題
Near the time of an election, a cable news service performs an opinion poll of
1,000 probable voters. It shows that the Republican contender has an advantag
e of 52 percent to 48 percent.
想請問b小題，在算出標準差為0.0158後，要用標準化去查z表，想請問為什麼解答是用0.
5-0.52/0.0158，看不懂為什麼是用0.5去減，感謝大家！
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※ 編輯: aron010515 (101.9.179.48), 12/11/2017 09:23:03
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12/11 09:53,
6年前
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12/11 09:53, 1F