August 2015
Intermediate to advanced
272 pages
5h 46m
Japanese
Content preview from Think Stats 第2版 ―プログラマのための統計入門
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105
105
7.10 用語集
生時体重対母親の年齢のパーセンタイルをプロットしなさい。この変数間の関係は、
どう特徴付けるだろうか。
7.10
用語集
散布図（
scatter plot
）
データの各行を
1
つの点で示す、
2
変数の関係の可視化。
ジッター（
jitter
）
可視化のためにデータに付加されたランダムなノイズ。
飽和（
saturation
）
お互いの点の上に複数の点がプロットされたときの情報損失。
相関（
correlation
）
変数間の関係の強度を測る統計量。
標準化する（
standardize
）
値集合を平均が
0
、分散が
1
に変換する。
標準得点（
standard score
）
平均からの標準偏差で表されるように標準化された値。
共分散（
covariance
）
2
変数がともに変化するという傾向を表す尺度。
順位（
rank
）
整列されたリスト内で要素が出現する場所のインデックス。
ランダム化比較試験（
randomized controlled trial
）
グループを無作為に分け、異なるグループには異なる処理を行うようにする実験。
実験群（
treatment group
）
ある種の介入を受ける対照試験の中のグループ。
対照群（
control group
）
処理を受けない、あるいは効果のわかっている処理を受けるような対照試験の中
106
7 章 変数間の関係
のグループ。
自然実験（
natural experiment
）
少なくとも近似的にランダムな形で対象が複数のグループに自然に分割されてい
るような実験。
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.