Classify each pair of samples as independent or dependent.

1. Sample 1: Triglyceride levels of 70 patients Sample 2: Triglyceride levels of the same 70 patients after using a triglyceride-lowering drug for 6 months.

2. Sample 1: Scores for 38 adult males on a psychological screening test for attention-deficit/hyperactivity disorder Sample 2: Scores for 50 adult females on a psychological screening test for attention-deficit/hyperactivity disorder