President Clinton is Type AB

There is a site called WIKIDATA which is a sister version of Wikipedia.
The blood type of the US president is posted, so it is quite convenient.
For example, President Clinton is type AB.

President Clinton

Blood Type

Is Putin O or AB?

Putin's blood type is either O or AB.

[Evidence of Type O]

Source: Blood Types of Celebrities and Foreigners

*Letters in red are translated from Russian using OCR and machine translation.

[Evidence of Type AB]

Source: 22:00-22:54 on May 21, BS-TBS, Foreign Reporters Saw Plus
Why do Japanese like blood types ? -- The nationality of typing things

What is certain is that President Putin and Prime Minister Medvedev have the same blood type.
This information is available to many media.
But the blood type was not disclosed at that time, so I don't know what type they are.
I suppose it is O, but what type is it actually?

Taylor Swift is Type O+

According to Answers.com and other sources, Taylor Swift is Type O+.

Notice: The picture above has been modified since the ad was removed.

Warren Buffett is O!

According to Answers.com Warren Buffett is O.

Notice: the picture above has been modified since the ad was removed.

Steve Jobs is Type O-

I find his blood type on Japanese Wikipedia!
It is type O, Rh minus.
For some reason, there is no blood type information on English Wikipedia.
Why?

The following is another source.

For your information, Time Cook, Apple's present CEO is O-, too.

Interesting study by Prof. Hideo Hirose: Human Intuition Can Guess Blood Type

Here is an interesting study by Mr. Hideo Hirose, Professor at the Kyushu Institute of Technology (now he is at the Hiroshima Institute of Technology), in which person's ABO blood types can be guessed intuitively.

Source: Hirose Lab.

Hideo Hirose, A Probabilistic Solution for the Mystery of Japanese Blood Type Prediction Accuracy (2015) Asian Conference on Psychology & the Behavioral Sciences 2015 Official Conference Proceedings. -> Source (PDF)

We have revealed that people implicitly use the underlying knowledge of relationship between personality and ABO blood types as imprinting, which shows us superficial human intuition ability.

Multivariate Covariance Analysis (MANCOVA) Textbook

There was nothing good in Japanese, so I asked for an English version of the book.

Patrick Dattalo, Analysis of Multiple Dependent Variables

Ah, this book seems to be quite tough to read.
I hope it doesn't become a sleeping pill (laughs).