Which of the following is a stratified sample?
Which of the following is a stratified sample?
| 1. |
Items or individuals are chosen without regards to their probability of occurrence. |
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| 2. |
The subjects of the sample are chosen on the basis of known probability. |
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| 3. |
Every individual or item from the frame has an equal chance of being selected. Selection may be with replacement or without replacement. |
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| 4. |
Decide on a |
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| 5. |
The population is divided into two or more groups according to some common characteristic, e.g., whether an employee is full-time or part-time; simple random sample is selected from each group; the two or more samples are combined into one. |
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| 6. |
The population is divided into several parts, e.g., counties or election districts, in which each is representative of the population; a simple random sample is selected from each cluster; the samples are combined into one. |
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