Cash deposit is immediate. Check deposit is immediate IF you have the funds to cover the check in your account. (Or you can go cash it at the bank from which it was written, then deposit the cash to your account). If not, it can take a few days--say a day for the bank to verify the funds, and another day to post it.
Definition of expound. transitive verb. 1a : to set forth : stateb : to defend with argument. 2 : to explain by setting forth in careful and often elaborate detail expound a law. intransitive verb.
A confounder is a variable that is correlated (directly or inversely) to the independent variable and correlated to the dependent variable. A lurking variable is a covariate that is not taken in account for by the researchers of the quantitative study. Confounding is a causal concept, and as such, cannot be described in terms of correlations or associations (see causal definition).