The phrase "accumulated an average of" is correct and usable in written English.
It can be used when discussing data or statistics that have been gathered over a period of time to indicate a mean value.
Example: "Over the past five years, the company has accumulated an average of 20% growth in sales annually."
Alternatives: "gathered an average of" or "achieved an average of".
After ∼644 generations of mutation accumulation, MA lines had accumulated an average of 118 mutations, and we found that average fitness across all lines decayed linearly over time.
The same result was observed for the total P accumulation in the shoots, as plants with nematodes accumulated an average of 300 μg plant−1 more P than sterile ones or inoculated with bacteria.
By age 20, the students whom the faculty nominated as the "best" players had accumulated an average of over 10,000 hours, compared with just under 8,000 hours for the "good" players and not even 5,000 hours for the least skilled.
Playas without grass buffers within cropland watersheds on average accumulated 8.5 cm of recent sediment and lost 30% volume of storage capacity, while those with grass buffers in mixed cropland watersheds accumulated an average of 1.8 cm of recent sediment and lost 7% volume.
By the age of 20, the best players had accumulated an average of over 10,000 hours -- thousands of hours more than less accomplished groups.
They accumulated an average of $29,400 for their student loans that year, according to the annual Project on Student Debt report from the Institute for College Access & Success.
To do this, they will accumulate an average of $24,000 in student loans.
During the regular season, Tennessee was ranked No. 13 in rushing, accumulating an average of 231.2 rushing yards per game.
Despite accumulating an average of 11.41 strikeouts per nine innings, Richard had trouble throughout the season with his pitching mechanics and control.
Individual tumors accumulate an average of 90 mutant genes [ 16].
In the current study, tumors from mice fed 1.15 ppm Se-casein accumulated an average Se concentration of 4.58 ppm, whereas s.c. injection of 1.5 ppm inorganic Se as selenite in a previous study resulted in MCF-7 tumor Se concentrations of 1.55 ppm [ 25].
