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A researcher for procter & gamble selects five states randomly, and then selects 10 supermarket chains within each of these states to call for a phone survey for a test mark…

A researcher for procter & gamble selects five states randomly, and then selects 10 supermarket chains within each of these states to call for a phone survey for a test mark…
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A researcher for procter & gamble selects five states randomly, and then selects 10 supermarket chains within each of these states to call for a phone survey for a test market of a new shampoo. which type of sampling procedure is being used?

User Kevin Krammer
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User Petesiss
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User Yad Smood
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