Paragraph 2 starts like this: > Our team analyzed the age of all business founders in the U.S. in recent years by leveraging confidential administrative data s

Paragraph 2 starts like this: > Our team analyzed the age of all business founders in the U.S. in recent years by leveraging confidential administrative data sets from the U.S. Census Bureau. We found that the average age of entrepreneurs at the time they... So they do answer your question in the article.