Thought Questions (Think about briefly, discuss with partner, and then move on)
The above descriptive analysis tells us what we have learned about the 50 subjects in the study. But can we make any inferences beyond what happened in this study?
- What are the two possible explanations for why there were a higher proportion of yawners in the yawn seed group?
- Consider the "random chance" explanation. Is it possible that the higher proportion of yawning in the yawn seed group could have risen just from an unlucky random assignment? Do you think it was probable?
- Suggest a way to explore how we could index cards to investigate whether random assignment alone could have led to this large of a difference. How many cards will you have? How many will be blue and how many green? How many will you deal out in each group?
