When researchers wish to create a pool of persons that represent the entire population, a method called is used to create that pool?

It is called "sampling". 

Sampling is a procedure utilized as a part of measurable investigation in which a predetermined number of observations are taken from a bigger populace. The approach used to sample from a bigger populace relies upon the kind of examination being performed, however may incorporate simple random sampling or systematic sampling.

this is an outline for the decisions that frankie is going to make

opportunity cost

willingness to buy

price or quality

of course, there could be many economic strategies that should be considered important while making decision. opportunity cost is the foremost significant factor while considering any economic option. when you buy something, you should know how much you are forgoing for this product. indeed, you could buy something different with this measure if you changed your mind. willingness to buy shows how much surplus you are earning while making a decision. it is important because it shows you buy what you want or you buy because you have only limited amount of money. the price or quality can be considered as a general economic option that we are applying while buying something. when you buy something, price or quality could be one of the options. indeed, they define the characteristics of the product.    

mark brainliest!

question 1:

senate and house of representatives

i would try to answer the second question but i’m not 100% positive but i hope i