Sociologists call a large group of people who occupy a similar economic position and have similar economic resources that influence the type of lifestyle they are able to lead in society:

Class

Explanation:

A social class is a group of people that are a part of a hierarchy based on the availability of economic resources a person possess. The classes are generally upper, middle and lower.

As the names suggest the upper class has the most amount of resources. The middle class has fewer resources than the upper class. The lower class has the least amount of resources.

The middle class is further divided into lower and upper middle class. The lower class generally consists of people who do manual labor. The upper class run the organizations that employ people from the middle and lower class.