The phrase "average ranging from" is correct and usable in written English.
It can be used when discussing a statistical range or variation of an average value in a specific context.
Example: "The average ranging from 50 to 70 indicates a moderate level of performance among the participants."
Alternatives: "average between" or "average of".
The regional sunshine amounts were not far from average, ranging from 92% in north-west England to 106% in Wales.
It earns money — according to the Census Bureau, an average ranging from $4.4 million over the course of a work-life for the holder of a professional degree, or about $1 million for the non-high-school graduate.
Analysis by the private tutoring website First Tutors suggests that the typical cost of a private tutor is now £22 an hour, with the national average ranging from £20 for primary and secondary tuition to £26 for help with university degrees.
The results revealed that LSP dormancy onset differed from the observed date of full leaf coloration by 5.25 days on average (ranging from 0 to 12 days).
Results revealed that the condylar surface roughness was not significantly different when comparing designs with a mean roughness average ranging from 43.6 to 116 nm.
During the six months study period, patients attended the outpatient centre three times each on average, ranging from one to twelve visits.
From March 2001 through July 2002, when the number of payroll jobs declined each month, the four-week average ranged from 365,000 to 496,000.
Figures released by the business department on Friday showed that of 21 City advisers that supplied early valuations in May, the average ranged from £4bn to £4.8bn.
The mean levels of CO (maximum 8-hr average) ranged from 0.6 to 6.1 mg/m.
During the study phase, the O3 1-hr maximum ranged from 11.6 to 57.5 ppb, and the PM10 24-hr average ranged from 39.5 to 109.9 μg/m.
