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Course: AP??/College Statistics?>?Unit 6
Lesson 1: Introduction to planning a study- Identifying a sample and population
- Identify the population and sample
- Generalizability of survey results example
- Generalizability of results
- Types of studies
- Worked example identifying observational study
- Invalid conclusions from studies example
- Types of studies
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Types of studies
Problem
Grace was curious if married people were more likely to be safe drivers than unmarried people.
Grace took a random sample of car accident records from the past years in her country, and she calculated what percent of accidents in the sample were caused by married people. She compared that result with the percentage of all drivers in the country that were married during that time period.
What type of observational study is this?
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