Aportion of the population selected to represent the population is called

Immigrants arriving in the united states during the late 1800s experienced many difficulties. which of the following was a problem which large numbers of immigrants faced?

Why was new orleans destined to be the center of slave trade in the southern united states

Amaster's degree candidate needs to conduct a research project for her master's thesis. she is interested in the types of junk food available to the public. she plans on going to the local convenience stores and asking the owners what types of junk food the store normally stocks and which are the biggest sellers. identifiers will not be collected. this study would fall under which of the following? a. expedited review b. exempt review c. full board review d. not human subjects