June 2024
Intermediate to advanced
200 pages
4h 46m
Japanese
Content preview from Python2年生 データ分析のしくみ 第2版 体験してわかる！会話でまなべる！
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Chapter
4
122
データのばらつきを比較できる：箱ひげ図
次は「箱ひげ図」を見てみましょう。
箱ひげ図は「データのばらつきを比較できるグラフ」です。「データのばらつき」はヒス
トグラムでわかりますが、「
1種類のデータのばらつき」はよくわかるのですが、複数のデー
タのばらつきを比較しようとすると、ごちゃごちゃしてわかりにくくなってしまいます。
そのようなときに、箱ひげ図を使うと便利です。
箱ひげ図は、四角形（箱）と、その上下に延びた線（ひげ）でできた図で、データ全体
を
4つに分けて考えます。25%ライン（第1四分位数）〜75%ライン（第3四分位数）の箱
を作り、
50％ライン（第2四分位数）に線を引きます（50％ラインとは中央値です）。その
箱から「最小値」と「最大値」へ、ひげを延ばし、外れすぎて外れ値と思われる部分は、
点で表した図です。
外れ値
最大値
第
3 四分位数（75% ライン）
中央値（
50% ライン）
第
1 四分位数（25% ライン）
最小値
外れ値
1/4
1/4
1/4
1/4
13
LESSON
ここでは箱ひげ図、散布図の使い方と作り方を説明します。
ばらつきのわかるグラフ
箱ひげ図は株で使う
ローソク足に似ているけど
見方が違うよ
LESSON
13
123
ばらつきのわかるグラフ
箱ひげ図も、ヒストグラムと同じようにデータの分布がわかる図なので、並べて見比べ ...
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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.
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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.