Which of the following is an example of a nominal variable?

A nominal variable is a type of variable that represents categories without any specific order or ranking. For example, if we look at the types of pets people have, such as dogs, cats, and birds, these categories are nominal because they simply label different groups without suggesting that one is better or more important than another. In research, we might ask people to choose their favorite type of pet from these options, and the answers would help us understand preferences. Since there’s no inherent order to the different types of pets, this makes it a clear example of a nominal variable. Thus, when collecting data, we treat each category equally, focusing on how many people choose each type rather than comparing them in terms of rank or value.