After volunteering for an experimental study, nora is included into a group of 30-year olds. she finds that there are other groups having people both younger and older than her. the study's results show that the mental scores of the younger lot are higher than the rest. nora was part of a

I believe the answer is: cross-sectional study

cross-sectional study refers to a type of observational study that use a group of subject from a population with a specific characteristic from a specific point of time. This type of study is usually used to assess the prevalence of acute or chronic conditions and not the perfect type to be used to find a causal relationship between variables,.

on december 1, 1774, the continental association was created to boycott all contact with british goods. by reversing the economic sanctions placed on the colonists, the delegates hoped britain would repeal its intolerable acts.

the economic difference between the three colonial regions. shipbuilding, whaling, fishing, and trapping where also main factors to the economy. the southern regional colonies economy was based on sugarcane, rice, cotton, tobacco, and indigo.