1. The problem is to find the difference between the mean scores of Cris and Andrew. 2. First, calculate the mean score for Cris. Scores: $80, 30, 72, 80, 62$ 3. Sum of Cris' scores: $80 + 30 + 72 + 80 + 62 = 324$ 4. Number of scores for Cris: $5$ 5. Mean for Cris: $\frac{324}{5} = 64.8$ 6. Next, calculate the mean score for Andrew. Scores: $65, 45, 51, 85, 24, 60$ 7. Sum of Andrew's scores: $65 + 45 + 51 + 85 + 24 + 60 = 330$ 8. Number of scores for Andrew: $6$ 9. Mean for Andrew: $\frac{330}{6} = 55$ 10. Now, calculate the difference between their mean scores: $64.8 - 55 = 9.8$ 11. Therefore, the difference in their mean scores is $9.8$.