Dr. Stat's library of literary classics includes issues of certain scholarly periodicals. The total number of issues of four such periodicals, together with the percentages of Dr. Stat's entire library that they comprise, are as follows:
Exactly one of the percentages in this table is incorrect. Which is it?
Definitions:
Experimental Study Designs
Research methods that allow investigators to directly manipulate variables to investigate cause-and-effect relationships between variables.
Line of Best Fit
A straight line drawn through the center of a group of data points plotted on a scatter plot, used to analyze and predict the relationship between variables.
Correlational Study
A research method that examines the relationship between two or more variables to determine whether a change in one variable is associated with a change in another.
External Validity
The degree to which the findings of a study can be generalized to other situations, populations, or settings.
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