Aresearch group involved with advertising is conducting a study to investigate whether shoppers are more likely to engage in impulse buying at the checkout than at any other place in the store. for the results of the study to be generalizable, the researchers should use a representative sample use a small convenience sample depend on self-report surveys create a double-blind procedure conduct an experimenta: use a representative sample
b: use a small convenience sample
c: depend on self-report surveys
d: create a double-blind procedure
e: conduct an experiment