It has been estimated that safe aircraft carrier landings op

It has been estimated that safe aircraft carrier landings operate at about the 5 sigma level. What level of ppm defective does this imply?

Solution

5 sigma determines the success of trials conducted by scientists of their experiments. If the success rate is 5sigma then we can say that if the experiment is reapeated 3.5 millions times then it would be expected to see the strength of conclusion in the result no more than once.

We can say that when safe aircraft carrier landings operate about the 5sigma level it implies 233 Defective PPM.