Answer:
Railroad expansion affected the US economy by creating jobs, establishing a national market, establishing a cattle industry on the Plains, and allowing certain people to acquire great wealth through investing in the railroad.
Explanation:
This is all I know.
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<u><em>Good luck!!!</em></u>
It's a great profession in my opinion <span />
Great Society; answer if its in USAtestprep
The correct answer is a representative portion of a universe in which each member of the universe has an equal chance of being included
A random sample is a subset of individuals (the sample) randomly selected from a larger set (the population) by a process that ensures that: All individuals in the population are equally likely to be chosen for the sample.