Review
Exercise 1 Page 345
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Remember that we can draw valid inferences about one or more populations only by analyzing a representative sample.
See solution.
Let's think how we can use sampling to draw inferences about one or more populations. First, remember the difference between a population and a sample.
| Population | Sample |
|---|---|
| A group of objects from which we collect data. | A part of population. |
We can use different sampling methods but it is important to choose a sample that is representative.
|
Representative Sample |
|
A sample that has the same characteristics as the population. |
