A Researcher Studies the Effect Upon Dental Caries Formation of a Year-Long

question 23

Multiple Choice

A researcher studies the effect upon dental caries formation of a year-long regimen of daily rinsing with a particularly noxious-flavored oral solution, only to discover that 285 of the 300 subjects in the study have withdrawn from it by the end of the first month. Which step in the research process was not properly undertaken?

• A)Defining the purpose
• B)Conducting the literature review
• C)Selecting study variables
• D)Performing a pilot study

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Definitions:

Binomial Random Variable

A random variable that follows a binomial distribution, representing the number of successes in a fixed number of binary experiments.

Standard Error

A statistic that measures the accuracy with which a sample distribution represents a population by using standard deviation and sample size.

Sampling Distribution

The pattern of probability distribution associated with a particular statistic, derived from a random sample.

Normal Curve

A type of continuous probability distribution for a real-valued random variable, characterized by its bell-shaped curve that is symmetrical around its mean.