26 Jan Types of samples: Independent, depende
Types of samples: Independent, dependent, and matched pairs
1. Determine whether the sampling method is independent or dependent for the following example. A researcher wants to know whether the newly issued “state” quarters have a mean weight that is different from “traditional” quarters. He randomly selects 18 “state” quarters and 16 “traditional” quarters. Their weights are compared.
2. Determine whether the sampling method is independent or dependent for the following example. A researcher wants to know whether the price of a one night stay at a Holiday Inn Express Hotel is less than the price of a one night stay at a Red Roof Inn Hotel. She randomly selects 8 towns where the location of the hotels is close to each other and determines the price of a one night stay.
3. Dependent samples are often referred to as matched pairs samples. For example, we have decided to lose weight in a Watch Watchers class so all of us weigh in at the beginning of class and follow a prescribed diet. Then we weigh in at the end of class and the means score are compared before and after the diet. Hopefully, we have lost some weight. The scores should show a significant difference. Provide another example of a matched pairs sample.
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