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Question:

An analyst decides to select 10 stocks for her portfolio by placing the ticker symbols for all the stocks traded on the New York Stock Exchange in a large bowl. She randomly selects 20 stocks and will put every other one chosen into her 10-stock portfolio. The analyst used:

A simple random sampling.
Explaination

In simple random sampling, each item in the population has an equal chance of being selected. The analyst’s method meets this criterion.