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svet-max [94.6K]
3 years ago
10

What was the purpose of the pony express

Social Studies
1 answer:
frutty [35]3 years ago
4 0
To create the speediest and most efficient mail delivery system between two vital transportation spots: St. Joseph, Missouri and Sacramento, California

got this from wiseGEEK
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Observational study observes individuals and records variables but doesn't attempt to influence the response (does not impose a treatment). It allows the researcher to directly observed the behavior of inteest rather than rely on the subject's self-descriptions (Survey) thus allowing the researcher to study the subject in its natural environment, thus removing the potentiallybased effect of the unnatural laboratory setting on the subject's performance.

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