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期望值




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統計學上,期望值(expected value),又叫平均,係個亂變值同佢嘅或然率x埋(或者 in 埋)例如: 擲公字,公嘅比率係50%,如果擲到公有10分,期望值就係 5分









由「https://zh-yue.wikipedia.org/w/index.php?title=期望值&oldid=782807」收










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