Let's just say that your local elementary school is interested in examining the relationship between how often students are washing their hands and the number of students who are home sick. A teacher researcher samples 8 different classrooms. The null hypothesis would claim that there is no relationship between the hand-washing and the total cases of sickness. What are the variables? And are they measured on ordinal/nominal levels or interval/ratio level or both? What are we calculating to examine this relationship? If we deem a strong relationship, what could I do as a next statistical test and what would it be determining?