…A manifold has an index as a topological invariant. [Takeyuki Tobita] (2) In statistical terms, an index or index number is an index that measures the relative increase or decrease in a quantity when moving from one state to another, and is usually defined as the ratio of the quantity of a selected state to the quantity of the state to be compared, multiplied by 100. There are no restrictions on the two states to be compared, and they can be two different times (e.g., two years), two different places (e.g., two cities), or two different groups of individuals (e.g., one-person households and two-person households among pensioner households). … *Some of the terminology explanations that mention "index number" are listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…多様体には位相不変量としての指数がある。【飛田 武幸】(2)統計用語としては,ある状態から他の状態へ移ったときの数量の相対的増減を測定するための指標を指数indexあるいはindex numberといい,通常それはある一つの選ばれた状態の数量に対するそれと比較されるべき状態の数量の比率に100を乗じたものとして定義される。比較される二つの状態には何の制約もなく,二つの異なる時点(例えば二つの年)でも,二つの異なる場所(例えば二つの都市)でも,また二つの異なる個人のグループ(例えば年金受給家計のうちの単身世帯と2人世帯)でもよい。… ※「index number」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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