I'm having a difficult time getting my head around the idea that B and A in the regression equation
Y= BX + A are statistics and that their signifcance can be estimated. Where is the sample of Bs and As, from which the standard error of each estimate is derived? I'd prefer an explanation that I can visualize. For instance, I'm thinking that on a scatterplot, the sample of As are points (derived from B) on the Y axis and connected to each of the data points by lines with the same slope as the regression line. Is that correct?
Thanks in advance