You Must Be This Old To ...

Check your IDs before going out treat-or-treating tonight. From Five Thirty Eight.

♬ Let's All Go to the Lobby ♬

Everybody to the Lobby or the Basement! Got to go out or get that laundry done! Patterns of discrete wear don't keep our collective behavior discreet. (From an NYC elevator).♬ Let's All Go to the Lobby ♬

Mean Data Security

Here's a simple approach obtaining summary statistical information from a group of honest people, that gives them complete personal data security, from Futility Closet:

My employer has nine workers. The nine of us want to determine what our average salary is, but none of us wants to divulge our own salary. Can we find the average without doing so?

Click through here for the answer.
Of course if one employee chooses to deceive, that one outlier makes this method not very resistant.

Pascal's Video

Here is a cute video about the wonders of Pascal's Triangle, although as they note he was very late to the party. Via Flowing Data.

 

'Professional' Probability

From Math with Bad Drawings, views of probability from various professions:

Via Flowing Data.