The explanatory variable is the clients while the response variable is change in duration.
A causal relationship is said to exist between variables whereby the occurrence of an event is as a result of another event.
In a causal relationship between variables, a value may represent explanatory variable while another value may represent a response variable.
An explanatory variable is the variable where observation of changes are being made such as the clients while the response variable are the outcome of the observation such as the duration of the run by each client.
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