Will a fluoride mouthwash used after brushing reduce cavities? Twenty sets of tw

Question

Will a fluoride mouthwash used after brushing reduce cavities? Twenty sets of twins were used to investigate this question. One member of each set of twins used the mouthwash after each brushing, the other did not After six months, the difference in the number of cavities of those using the mouthwash was compared with the number of cavities for those who did not use the mouthwash. This scenario is an example of a matched pairs experiment. a two-factor design. a randomized comparative experiment. a randomized observational study. Match the following terms with their parts in the experiment The treatment is The response is The subjects are

Explanation / Answer

10) A matched pairs design

11) Treatment is fluoride mouthwash used or not.
Response is the difference in number of cavities between the two treatments
The subjects are the 20 sets of twins

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