Sentences with phrase «sigma events happen»

When 10 (or more) times as many 3 - sigma events happen... we have a problem.

If this all wasn't scary enough, +4 - sigma events are now happening about 5 % of the time and +5 - sigma events, that formerly had a return time of about a million years, are now occurring about as often as 3 - sigma events happened 50 years ago.

Not exact matches

While those rumors eventually turned out to be true, the hard data only amounted to what scientists call a 3 - sigma signal, meaning that there is a 0.13 percent probability that the events happened by chance.