January 2015
Beginner to intermediate
628 pages
13h 33m
Japanese
Content preview from 統計クイックリファレンス 第2版
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110
4 章 記述統計と図表示
床効果は今回のデータではない。
図
4-13
2007
年と
2008
年の期末試験の点数比較の箱ひげ図（
SPSS
を使用して作成）
4.6.5
ヒストグラム
ヒストグラムは連続データを示すのに、よく選択される手法の
1
つである。ヒストグラム
は棒グラフに似ているが、ヒストグラムでは棒（連続分布から値を入れるビンとして考えら
れるので、ビンとも言う）は、棒グラフとは違って互いに隣接している。ヒストグラムは棒
グラフよりも棒の数が多くなる傾向にある。ヒストグラムの棒は、同じ幅である必要はない
（もっとも同じことが多いが）。ヒストグラムの
x
軸（横軸）は、単に名前が並んでいるので
はなく尺度を表し、各棒の面積はその範囲にある値の割合を表す。
図
4-14
は期末試験データを
SPSS
で作成したヒストグラムで、
4
つの棒の幅は
10
であり、
正規分布が重ねて書いてある。このヒストグラムの形は、
90
度回転しなければいけないが、
同じデータ（図
4-10
）の幹葉図の形と非常に似ていることがわかる。
50
70
80
90
100
60
期末
2007
期末
2008
111
111
4.6 棒グラフ
図
4-14
10
のビン幅のヒストグラム
正規分布は
3
章で詳しく議論されている。理論的な分布で、よく知られている釣鐘型（
bell
）
である。データ集合の値がどれくらい正規分布しているかがわかるように、正規分布はヒス ...
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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.