(3 marks) Credit up to three marks for accurate description. For example: • We found a significant correlation between self-rated aggression and height (1). The taller people were the more aggressive they rated themselves on a scale out of 10 (1). The correlation coefficient was 0.666 for a one-tailed test with 10 participants which was more than the critical value (1). Look for other reasonable marking points. Generic answers score 0 marks. Answers must relate to the biological practical of a correlational study into aggression or body rhythms. (3)