Temporal sequence, concomitant variation, and non-spurious association are the three chief types of evidence used to evaluate if a relationship is casual.
A casual relationship exists when one variable in an exceedingly data set includes a direct influence on another variable. Thus, one event triggers the occurrence of another event. an informal relationship is additionally spoken as cause and effect.
The three chief evidences:-
1. Temporal sequence: The cause must occur before the effect.
2. Concomitant variation: The variation must be systematic between the 2 variables.
3. Non-spurious association: Any variation between a cause and a control must be true and not simply because of other variables.
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