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An analyst is conducting a satisfaction survey, sampling from a list of 20,000 new car buyers....

An analyst is conducting a satisfaction survey, sampling from a list of 20,000 new car buyers. The list includes 5,000 Ford buyers, 5,000 GM buyers, 5,000 Honda buyers, and 5,000 Toyota buyers. The analyst selects a sample of 400 car buyers, by randomly sampling 100 buyers of each brand. What kind of sample is this?

a. Cluster Sample b. Systematic Random Sample c. Quota Sample d. Convenience Sample e. Judgment Sample f. Stratified Random Sample g. Simple Random Sample

math   Statistics-And-Probability   
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Answer #1

The correct answer is

- f. Stratified Random Sample

Reasoning:

In stratified sampling, population is divided in different strata i.e. categories and samples are drawn from each strata

Here, different categories are 5,000 Ford buyers, 5,000 GM buyers, 5,000 Honda buyers, and 5,000 Toyota buyers. And The analyst selects a sample of 400 car buyers, by randomly sampling 100 buyers of each brand. Thus, it follows Stratified Random Sampling

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