A certain DCC instructor (who will remain anonymous) believes the "honeymoon period" ends at some point between the first and second exam.The professor believes the evidence for his claim lies in the significant decrease in scores between the first and second exams.He randomly selects 46 of his students and records both their first and second exam scores.(See columns 2 and 3)

1. Was dependent or independent sampling used?Explain your choice.
2. Does the sample data provide sufficient evidence to conclude that the "honeymoon period" ends between the first and second exams?Use a 1% significance level.

Exam 1 Exam 2 78.6 55.9 24.3 58.8 47.1 25 84.3 86.8 85.7 66.2 78.6 66.2 91.4 91.2 54.3 66.2 80 42.6 71.4 77.9 61.4 80.9 78.6 100 71.4 77.9 80 94.1 78.6 70.6 18.6 29.4 28.6 47.1 67.1 63.2 88.6 79.4 82.9 80.9 100 95.6 31.4 29.4 71.4 63.2 61.4 60.3 68.6 66.2 82.9 89.7 47.1 47.1 48.6 45.6 91.4 94.1 22.9 25 80 85.3 74.3 72.1 64.3 70.6 52.9 57.4 65.7 85.3 80 69.1 61.4 26.5 90 48.5 57.1 92.6 92.9 88.2 78.6 75 88.6 55.9 64.3 50 18.6 42.6 47.1 29.4 71.4 76.5