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A panel of dentists is interested in testing two different toothpaste brands (A and B) to see if there is a relationship between the brand and whether or not the patient has a cavity at their next appointment.  A representative sample of 60 patients is recruited to take part in the study.  At their first appointment of the year, each subject is assigned to brush their teeth with one of the two brands for the next six months.  At their follow-up appointment six months later, they were checked for cavities. What method of data collection was used?  Select one: a. Experiment b. Observational Study

A panel of dentists is interested in testing two different toothpaste brands (A and B) to see if there is a relationship between the brand and whether or not the patient has a cavity at their next appointment.  A representative sample of 60 patients is recruited to take part in the study.  At their first appointment of the year, each subject is assigned to brush their teeth with one of the two brands for the next six months.  At their follow-up appointment six months later, they were checked for cavities. What method of data collection was used?  Select one: a. Experiment b. Observational Study

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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A panel of dentists is interested in testing two different toothpaste brands (A and B) to see if there is a relationship between the brand and whether or not the patient has a cavity at their next appointment.  A representative sample of 60 patients is recruited to take part in the study.  At their first appointment of the year, each subject is assigned to brush their teeth with one of the two brands for the next six months.  At their follow-up appointment six months later, they were checked for cavities.

What method of data collection was used? 

Select one:

a.
Experiment


b.
Observational Study

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