In a study investigating media influence on prosocial behavior, 30 participants played a video game. Half of the participants played a cooperative, prosocial game. The other half played a neutral puzzle game. After finishing the game, a confederate dropped a box of pens in front of each participant. The researcher recorded whether each participant helped to pick up the pens ('Helped' or 'Did Not Help'). The researcher decided to use a Chi-Squared test to analyse the data. One reason for choosing this test was that the study used an independent groups design (each participant was tested in only one condition). Referring to information about this study, explain two other reasons why it was appropriate to use a Chi-Squared test in this case.