Question:

What technique for gathering data (sampling, experiment, simulation or census) do you think was used in each of the following studies?

1. 100 members of a large labor union were polled regarding a proposed new contract.
2. A computer program was used to simulate movements of the earth's crust near an earthquake fault in an attempt to predict earthquakes.
3. To test the safety of refrigerated packaged meat products, 6 packages were chosen and their bacteria determined.
4. All residents of a town were surveyed to determine the demand for home dairy delivery service.
5. A volunteer group of 20 elderly residents of a care facility were given a program of nutrition and regular exercise. Their level of mental alertness was measured before and after they completed the program.

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