Answer:
ANOVA
Step-by-step explanation:
The statistical tool ANOVA( analysis of variance) is used here. Created by Ronald Fisher in 1918, Analysis of variance test is used to test the influence of independent variables on dependent variables in a regression study. Here individuals are randomly assigned to different versions of advertisement test(comparison of groups) and the analyst tries to determine which "curiosity level" gets desired results by measuring variability and determining any relationships that may exist.