Unformatted text preview: internet. 4. (Hypothetical) A researcher wants to survey 1,000 people at her university in order to find out whether they prefer coffee or tea. She takes a simple random sample based on student and employee ID numbers and calls each person in her sample. Is she likely to get unbiased results if she asks the person “Isn’t coffee better than tea?” Why or why not? 5. (Hypothetical) A toothpaste manufacturer wants to show that more people buy its product than any other toothpaste brand. To prove this, they hire a polling organization to take a simple random sample of 1,000 families. Each person in the family above age 5 is asked if they use the manufacturer’s toothpaste. What is wrong with this sample?...
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- Spring '08
- Statistics, Simple random sample, student ID numbers, ID numbers, employee ID numbers