経営コンサル日誌

NISHIコンサル日誌のバックナンバーブログです。

日記

統計を読み解くリテラシーを上げる方法

投稿日:

こんにちは。NISHIです。

今日は初心に帰って(?)
統計の見方についてのお話です。

こちら、見方によっては良記事です。
軽く一読を。

http://grass-ex.jp/Lo30/11371

この内容って、
「わかりやすいですね~」と言う人、
「何でこんなの紹介するの?」と言う人、
見る人によって意見は
割と分かれるんじゃないかと。

それはさておき、
以前にもお伝えしたかと思いますが、
統計って「ウソ」ですよね。

より正確に言いますと、
統計って正確ではありませんよね。
実態を正確に表したものではない。

だからこそ、
「その統計は実態に近いのか?」を
ちゃーんと見なきゃ騙されるのです。

統計をちゃんと読み解くことができる
ちょっとした「りてらしー」は
最低限、身につけるべきで、
実はそれほど難しいことではありません。

さて、この記事は、

==
・「平成28年度」の
・「家計の金融行動に関する世論調査
(単身世帯調査)」における
・「独身者と2人以上世帯の
年代・年収別の貯蓄額」
==

を元データにしており、
「年代別世帯人数別にどれだけ貯蓄あんの?」
というお金に関する統計です。

この記事から少し引用してみましょう。

==

論より証拠ということで、
30代、独身で、
年収1000万~1200万円の
欄を見てください。

平均値も中央値も
7600万円の貯蓄がある
結果になっています。

一番右端の「総数」という欄に
2と書いていますが、
これは調査人数が2人ということを
表しています。

つまり、たった2人の回答が、
日本全国30代・年収1000万~1200万円の
独身者の平均のように見えてしまうのです。

==

どうです?
何がわかりますか??

簡単な見立てを立てると、

・平均値はアテにならない
・分布をしっかりみる
・母数をちゃんと確認する

こういう単純なことがわかるかと
思います。

それにしても
調査対象人数2人ってwww

表面的な数字だけパッと見て
騙される人、流される人。
この例は笑い話程度で済みますが、
話題や場面によっては
それだけで致命傷になることは
おわかりいただけるかと思います。

とはいえ、
見るべきポイントって割と単純。
そう思いませんか?

あえて平均値が強調されているなら、
それは疑わしきとみて疑う。

分布はどうなっているのかを見る。

調査対象となる母数を確認する。

たったこれだけでも、
統計から実態に近いラインを
推測することは可能です。

余談ですが、記事元は
「日経ウーマン」なんですね。

ウーマンといえば女性。
女性と言えば、右脳系感覚派。
(↑雑すぎですがwww)

どちらかというと、
数字や統計といった類は苦手と
思われる女性に向けた記事。

と、いうことは、この記事、
初心者や素人向けになります。

いいですか?

知識がついてきた。
業界になれてきた。
そういう時に陥りがちな罠は、
「顧客から離れてしまう」ということ。
——————————-

顧客の何から離れるのか?

顧客の心理や、
顧客に適した表現から、です。

それでは、顧客から
離れないようにするには
一体どうすればいいか?

もう、ここまででお分かりですよね。
こういう記事って見方によっては
「初心者向け表現のヒント」にも
なるかと思います。

では。

NISHI

-日記

執筆者:


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コンサルは「この魔法」をかけなさい。

こんにちは。NISHIです。 昨日に引き続き、 スポーツ系記事からの引用ですが、 この記事には【ある重要ポイント】が 埋め込まれています。 もちろん、 【コンサルとしての重要ポイント】です。 コチラ。 …