Indicators For each of these potential predictor variables, say whether they should be represented in a regression model by indicator variables. If so, then suggest what specific indicators should be used (that is, what values they would have).

a) In a regression to predict weekly household milk consumption, whether a teenager is living in the home

b) In a regression to predict the square footage available for rent, the number of stories in a commercial building

c) In a regression to predict the amount an individual’s medical insurance would pay for an operation, whether the individual was over 65 (and eligible for Medicare)