Table 1.

Biological and statistical questions addressed by the students through the bat activity in zoology class

Biological questions	Statistical understanding questions
1. Do you expect to see differences in the wingspan and weight between male and female bats? Hypothesize.	1. Test for differences in wingspan and weight between sexes. State your null and alternative hypotheses. What does it mean to have statistical significance?
2. If there are differences, can they be appreciated graphically? Illustrate.	2. What probability value must be associated to a statistic in order to reject your null hypothesis? What does it mean to have a p > 0.05?
3. Do you expect to see a relationship between wingspan and weight for all bats? Predict how this relationship might be and justify.	3. What does it mean to have a significant Pearson product-moment correlation coefficient (r) between two variables?
4. If present, can this relationship be illustrated graphically?	4. What is the difference between a positive or negative r?
5. Does this relationship hold for males? For females? Explain.	5. What additional information can you get from a linear regression if you have already determined a significant positive r?