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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53
53
4.5 CDF を比較する
4.5
CDF
を比較する
CDF
は分布の比較に特に役立ちます。例えば、第一子と第二子以降の新生児の体
重分布の
CDF
をプロットするコードは次のようになります。
first_cdf = thinkstats2.Cdf(firsts.totalwgt_lb, label='first')
other_cdf = thinkstats2.Cdf(others.totalwgt_lb, label='other')
thinkplot.PrePlot(2)
thinkplot.Cdfs([first_cdf, other_cdf])
thinkplot.Show(xlabel='weight (pounds)', ylabel='CDF')
図
4-4
が結果を示します。図
4-1
と比べると、この図では分布の形状がはっきり
していて、それらの相違がずっと明確です。全体を通じて、第一子の方がわずかに軽
いことがわかります。特に平均値より上では違いが大きくなっています。
図
4-4
第一子とその他の子の出生時体重の
CDF
体 重（ ポ ン ド ）
CDF
出生時体重
第一子
その他
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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.