prevalence of tooth decay in countries that have fluoridated water with the prevalence in countries that do not. a. Is this a randomized experiment or an observational study? b. Assume that tooth decay was seen to be less common in countries with fluoridated water. Could this result be due to confounding?
Contingency Table
A contingency table can be defined as the visual representation of the relationship between two or more categorical variables that can be evaluated and registered. It is a categorical version of the scatterplot, which is used to investigate the linear relationship between two variables. A contingency table is indeed a type of frequency distribution table that displays two variables at the same time.
Binomial Distribution
Binomial is an algebraic expression of the sum or the difference of two terms. Before knowing about binomial distribution, we must know about the binomial theorem.
Researchers examine the association between the fluoridation of water and the prevention of tooth decay by comparing the prevalence of tooth decay in countries that have fluoridated water with the prevalence in countries that do not.
a. Is this a randomized experiment or an observational study?
b. Assume that tooth decay was seen to be less common in countries with fluoridated water. Could this result be due to confounding?
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