Simplified version: Has there been a change in mood?

This activity can be used to help students understand research methods, descriptive statistics and inference. Data is collected on mood before and after a deep breathing exercise. The deep breathing exercise can easily be changed to something else. The students are then invited to compare the before and after data informally and then using descriptive statistics. They then begin to think about statistical testing - in this activity they need to carry out the sign test. Please note this is a simplified version of: https://teacher.desmos.com/activitybuilder/custom/6036153febafd245c06b701f?collections=60450de60b582249ba4c376c and does not contain the binomial distribution. Thanks to @DeborahSekreta for the breathing slide.

By Catherine van Saarloos