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34. You are enrolling swimmers in a study on lung capacity. You want 25% of your...

34. You are enrolling swimmers in a study on lung capacity. You want 25% of your sample to be those who compete at 100m or less distances and 50% to be swimmers who compete at 100m-500m distances and 25% to be swimmers who compete at >500m distances. You begin enrolling for your study at 5am at the pool. By 9 AM you have all of your 100-500m swimmers enrolled, and all of your >500m swimmers enrolled. This is an example of what type of sampling method?

a.quota sampling

b. stratified sampling

c. cluster sampling

d.probability sampling

math   Statistics-And-Probability   
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