what is the significance of beta_1 in standard DID what is the significance of x in a statistically significant analysis why do we care about the control variables in differences in differences analysis when a variable is not statistically significant, how does the significance of that variable depend on the control vs. experiment variable? what does statistically significant mean for variables difference test what does it mean if the variables are not statistically significant? what would mean if the coefficient is insignificant what does the significance of p value mean what would it mean if the variables in the standard did model were not statistically significant? what does the significance of beta_1 mean in a differences analysis? does the significance of y==alpha+beta_1$ mean that an experimental group differs from the control group? what does the significance of y mean how to interpret differences in differences model is data value significant what does the significance of beta_1 mean what's the significance of the beta_1 variable in a DIF what does the significance of a data variable mean what does it mean when a test variable is not a statistically significant variable? what does data significance indicate what does the significance for a dif model mean?