They found average lodging costs were just $42 a night, or roughly $8 a person.
Researchers found average incomes of $12,000 in Iowa and Ohio and $14,000 in Indiana and Minnesota.
It is important to keep in mind, too, that the new study found average difference in I.Q.; the scores varied widely from family to family.
Analysing Bolivia, Brazil and Colombia between 2000 and 2012, the report found average deforestation rates inside tenured indigenous forest were two to three times lower than outside.
The study found average marks were very low compared with what would be expected in a real GCSE exam – even for students from the best-performing schools.
A recent study found average snow depth at the latter was 183cm in mid-March, that's 28cm more than in mid-February.
In the mid-1980s, the Institute for Fiscal Studies carried out a survey of 309 British councils and found average savings of 22%, and no reduction in quality, when they used private dustbin men.
The study found average noise levels of 52.6 dBA at night and 53.9 dBA during the day at the nursing station, with a maximum sound peak of 90.6 dBA.
The researchers found average concentrations of 15,000 parts per million inside trees in the Yale Myers forest in northeastern Connecticut, which is managed by the university's forestry school.
Research by the economists Thomas Philippon of New York University and Ariell Reshef of the University of Virginia found average remuneration in the financial industry rose from about par with wages in the non-farm private sector in 1980 to about 1.7 times today.
Honda and Shimizu (1998) found average CIA values of 54.6 in sediments from the Taklimakan desert.
