A researcher rejects the null hypothesis when there is a statistically significant difference between the means of the groups in a study

In the context of an experiment, a variable is

a. any factor that can vary across participants or situations. b. any phenomenon or characteristic that can be measured. c. any phenomenon or characteristic of a participant or situation that has a specific value. d. the unknown quantity that the experiment will determine.

The metaphor of the tragedy of the commons demonstrates that individual self-interest can have a destructive effect on the interest of the community

Indicate whether the statement is true or false