When the conclusions based upon the unaggregated data can be completely reversed if we look at the aggregated crosstabulation, the occurrence is known as

A) ​Reverse correlation.
B) ​Negative correlation​.
C) ​Simpson's paradox.
D) ​Pareto's rule.

Simpson's Paradox

A phenomenon in statistics where a trend appears in several different groups of data but disappears or reverses when these groups are combined.

Aggregated Crosstabulation

A statistical method used to analyze and summarize data between two or more categorical variables in a table format.

Unaggregated Data

Raw data collected at its most detailed or base level, not yet summarized or grouped into larger categories.