The phrase "a person of average" is correct and usable in written English.
It can be used to describe someone who possesses typical or moderate qualities, skills, or characteristics in a particular context.
Example: "In terms of athletic ability, he is just a person of average talent compared to his peers."
Alternatives: "an average individual" or "a typical person".
How did a person of average ability improve over time?
Bargeron's kitchen offered lots of opportunity for vertical storage, but it wouldn't be accessible to a person of average height.
It turns a person of average build into a walking sport utility vehicle, and -- this is the point -- makes him or her look bigger than anyone else around.
Our conclusion is that at any distance greater than two feet, to a person of average eye sight, Shakespeare's head looks like a kangaroo with a book in its pouch.
The average of all scores stayed the same across the years, but individual IQ scores rose or fell by as many as 21 points, a substantial difference – enough to take a person of "average" intelligence to "gifted" status, or vice versa.
"Given that even a person of average temperament might have found this annoying, let alone someone with a reputation for being, well, impatient, I was grateful for the good humor that Martha displayed (she even helped clean up the mess)," Mr. Blodget wrote.
I'm still baffled as to how a person of above-average intelligence would not think calling another's God(s) "false" or their worship "idolatry" would not be, but I digress.
The term inferiority complex has lost much of its significance through imprecise popular misuse for example, as an inappropriately facile explanation of any show of ambition by a person of less-than-average height.
The important thing to note in all this is that the mice were exposed to UV rays meant to approximate "midday sun exposure in Florida during the summer for [a] fair-skinned person of average tanning ability" -- in other words, a fairly moderate, normal amount of sun for many North Americans.
Future study should explore other mappings: for instance variance relative to a person's average amount of movement would better capture the idea of relatively slow or fast.
Instead, it's that the quality of work produced during that time is higher than that of a person's average output over all.
