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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57
57
4.9 演習問題
def PositionToPercentile(position, field_size):
beat = field_size - position + 1
percentile = 100.0 * beat / field_size
return percentile
私の年齢グループ
M4049
は「
40
歳から
49
歳の男性」という意味で、そこで私は
256
人中
26
位でした。私の年齢群でのパーセンタイル順位は
90
％でした。
もし、
10
年後も走っていたら（そうなることを望んでいます）、私は
M5059
区分
になります。自分の区分内でのパーセンタイル順位が変わらないとしたら、私はどれ
くらい遅くなると予期できますか
?
この質問に、
M4049
でのパーセンタイル順位を
M5059
に変換して答えることがで
きます。コードは次のようになります。
def PercentileToPosition(percentile, field_size):
beat = percentile * field_size / 100.0
position = field_size - beat + 1
return position
M5059
には
171
人いるので、同じパーセンタイル順位を占めるには、
17
番目と
18
番目の間に来なければいけません。
M5059
の
17
番のランナーの記録は、
46
分
05
秒でしたから、それがパーセンタイル順位を維持するために、達成しなければならな
いタイムになります。
4.9
演習問題 ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
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.