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
5
158
mean = 166.8
std = 5.8
per = 0.01
ppf = norm.ppf(q=(1-per), loc=mean, scale=std)
print("
上から", per * 100, "%の値は、", ppf, "です。")
上から 1.0 %の値は、 180.2928176694369 です。
上から1%は、約180.3cmだとわかります。
違うばらつきのデータでの比較
この「norm.cdf」を使うと、「違うばらつきのデータ」でどちらがより珍しいかを調べる
ことができます。
例えば、あるテストで数学は
60点、英語は80点を取ったとします。どちらががんばった
でしょうか？ ただし、平均点は数学が
50点、英語は70点で、標準偏差は、数学が5点、
英語が
8点でした。
数学 英語
点数 60 80
平均値 50 70
標準偏差 5 8
【入力プログラム】リスト 5.16
出力結果
このクラスで上から
1%
の
身長は？ ジャーン、
約
180.3cm
でした！
とうとうテストに
お話がうつちゃったな。
159
この値は普通なこと？ 珍しいこと？
LESSON
17
パッと見ると、がんばったのは80点の英語のように思えますが、平均点や標準偏差が違
います。このようなとき、「
2つの点が上から何％の珍しいことか ...
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