Identify each sample as biased or unbiased and describe its type. Explain your reasoning.
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2. To determine the theme for the homecoming dance, the homecoming committee surveys one classroom.

6. To determine the quality of a new cell phones coming off an assembly line, the manager chooses one cell phone every 20 minutes and checks it.

8. To determine whether a candidate for a governor is popular with the voters, 30% of the citizens in each pf the 254 countries are surveyed.

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