Question

identifying a survey question for a given population
determine the best survey question for a population of all cell phones produced by a company.

• what is the average number of cell phones owned by a family of four?
• what percentage of cell phones made by the company are defective?
• who is the typical user of cell phones produced by the company? (with a red x)
• how many minutes does a teen usually spend on a cell phone?

Explanation:

To determine the best survey question for the population of all cell phones produced by a company, we analyze each option:

1. “What is the average number of cell phones owned by a family of four?” – This focuses on families’ cell phone ownership, not the cell phones produced by the company. Irrelevant to the target population.
2. “What percentage of cell phones made by the company are defective?” – This directly addresses the quality of cell phones produced by the company (the target population). It is a measurable, relevant question for surveying about the company’s cell phones.
3. “Who is the typical user of cell phones produced by the company?” – This focuses on users (people), not the cell phones themselves. The population is “cell phones produced by the company,” so this is off - topic.
4. “How many minutes does a teen usually spend on a cell phone?” – This focuses on teens’ cell phone usage, not the cell phones produced by the company. Irrelevant to the target population.

Answer:

What percentage of cell phones made by the company are defective?