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A political scientist is interested in the effect of government type on economic development. She wants...

A political scientist is interested in the effect of government type on economic development. She wants to use a sample of 30 countries evenly represented among the Americas, Europe, Asia, and Africa to conduct her analysis. What type of study should she use to ensure that countries are selected from each region of the world?

a. Observational - simple random sample

b. Observational - cluster

c. Observational - stratified

d. Experimental

Math   Statistics-And-Probability   
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Answer #1

ANSWER::

ANS:: Observational stratified

Explanation- In stratefied sampling, we first divide the population into homogenous groups called strata. And then randomly sample from within each stratum.

In this case America, Europe, Asia and Africa are strata and then countries are selected from each starata randomly.

Option:: (C) is correct..........

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