A Ship and Her Crew
Transitional Humans are more a religious movement than a species of Human. With a fervent belief that man should stride to improve itself through technology. There is no way to speak of Transitional Humans in averages. These are people who have altered themselves through the use of genetic manipulation and cybernetics. The only thing known for certain is the vast majority of psychic individuals come from Transitional Humans. Unlike Spacers, the psychic powers of a Transitional human are more focused inward. Enhancing their own abilities, precognition and even telepathy are common among the Transitionals.
As far as appearance, they vary wildly in skin tone, height, weight, age and abilities. Some are even barely recognizable as Human. With oddly colored skin, extra limbs and even additional sensory organs.
As such, there are no specific averages listed.