Weighted Average

subtopic to measurement

[under construction]

Bi-Directional Average

An average ratio of two numbers, similar within a factor of 2x, exists either arithmetically or geometrically as, (a/b)-(b/a) / 2 or sqrt( (a/b)+(b/a)-2 ). [I've used this when comparing planets twinning: for example Venus:Earth is .82:1.0 for 1.22-.82/2 = 20%]

[under construction]

Grand-Admiral Petry
'Majestic Service in a Solar System'
Nuclear Emergency Management

1996 GrandAdmiralPetry@Lanthus.net