The premises are intended only to make the conclusion probably true and, thus, reasonable. The traditional definition of induction as any argument proceeding from the particular to the general is mistaken. So, it is likely that the next person surveyed will also claim to prefer brand Z. Most actors are extroverts. Jerry is an actor. So, it is likely that Jerry is an extrovert.
All cows are mammals and have lungs.
All whales are mammals and have lungs. All humans are mammals and have lungs. So, it is probable that all mammals have lungs. Inductive arguments are not valid or invalid. Inductives arguments are strong or weak depending on the degree to which the premises support the conlusion.