Which of the Following Is Considered to Be a Disadvantage

question 23

Multiple Choice

Which of the following is considered to be a disadvantage of fluoridating drinking water?

• A)The concentration of fluoride in drinking water is usually 0.7-1.0 ppm.
• B)Some hydroxide ions in tooth enamel are replaced by fluoride ions.
• C)High fluoride consumption in early childhood can cause mottling of the teeth.
• D)Treatment with fluoride results in harder tooth enamel.

---

Definitions:

Z-test

A statistical test used to determine if there is a significant difference between the means of two variables, based on a normal distribution.

Chi-squared Distribution

A statistical distribution showing how the sum of squared independent standard normal variables is distributed, often used in hypothesis testing.

Goodness-of-fit Test

A statistical test used to determine if sample data fits a distribution from a population with a normal distribution.

Contingency Table

A type of table used in statistics to summarize the relationship between several categorical variables, showing the frequencies at which certain combinations of variables occur.