I don't know what you think that case study was about, but it isn't about whether the number was true or not. It is about whether that number represents something that is in line with the point of the article.

> And I am not sure what to expect from a statistical course build around TED Talks, blog posts and NY Times articles.

I wouldn't either, but it isn't a statistical course and it isn't build around TED Talks.

It is not about learning what they are saying in a TED Talk, but about dissecting the TED Talk and understanding why you shouldn't just accept the content of it.

All the case studies are examples of bullshit.