Today on the Journal of Nuclear Physics Andrea Rossi made this announcement:
November 11, 2017 at 7:00 AM
We reached Sigma 5.
Now preparing for the demo.
This has been an important goal for Rossi for around a year now, and something he has been extremely focused on, although he has been somewhat vague regarding exactly how he has been measuring it. He says it is determination of the reliability of the E-Cat QX, and from some of his comments it has been important not only to him, but to an outside partner.
This an excerpt from an article that discusses 5 sigma in connection with the Higgs boson
For some fields of science, however, 2-sigma isn’t enough, nor 3 or 4-sigma for that matter. In particle physics, for instance, scientists work with million or even billions of data points, each corresponding to a high energy proton collision. In 2012, CERN researchers reported the discovery of the Higgs boson and press releases tossed the term 5-sigma around. Five-sigma corresponds to a p-value, or probability, of 3×10-7, or about 1 in 3.5 million. This is where you need to put your thinking caps on because 5-sigma doesn’t mean there’s a 1 in 3.5 million chance that the Higgs boson is real or not. Rather, it means that if the Higgs boson doesn’t exist (the null hypothesis) there’s only a 1 in 3.5 million chance the CERN data is at least as extreme as what they observed.
So Rossi and his team have set the bar very high, and are apparently satisfied with the result. Now on to the demo!