Populations and Samples. Warm Up 1. 2. 3. 4. 5.6.

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Presentation transcript:

Populations and Samples

Warm Up

How might you choose a sample of size 20 to determine the preferred practice day of all the players in a soccer league? Why do you think samples are used? Why not survey each member of the population?

For a survey, a company manager assigned a number to each of the company’s 500 employees, and put the numbers in a bag. The manager chose 20 numbers and surveyed the employees with those numbers. Did the manager choose a random sample?

Determine whether each question may be biased. Explain. When it comes to pets, do you prefer cats? What is your favorite season?

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