What is the primary purpose of a "dummy" in the context of software development? (Advanced)
#1: To create realistic user scenarios
#2: To serve as a placeholder for data
#3: To generate random test cases
#4: To optimize code performance
What does the term "dummy variable" refer to in statistical analysis? (Genius)
#1: A variable with a numeric value
#2: A variable used to replace missing data
#3: A binary variable that represents categorical data
#4: A variable that always equals zero