Suppose that we wanted to run a study comparing recall of nouns and verbs. We present each subject with 25 nouns or 25 verbs and later ask for recall of the list. We look at both differences between...

Suppose that we wanted to run a study comparing recall of nouns and verbs. We present each subject with 25 nouns or 25 verbs and later ask for recall of the list. We look at both differences between parts of speech and between different words within the category of “noun.” What variable is a fixed variable and what is a random variable?