Populations and Samples
Warm Up
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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?