Yes, taking timed mock tests can help improve your decision-making skills in selecting questions to attempt and skipping those you're unsure about. Here's how:

1. Familiarization:
- Taking timed mock tests helps you become familiar with the format and structure of the actual exam.
- By regularly practicing under timed conditions, you will develop a sense of the pace at which you should attempt questions.
- This familiarity will enable you to make quicker and more informed decisions when it comes to selecting questions and skipping those you're unsure about.

2. Time Management:
- Timed mock tests teach you the importance of managing your time effectively during the exam.
- When you have a limited amount of time, you need to prioritize the questions based on their difficulty level and your proficiency in those topics.
- By practicing timed mock tests, you will learn to quickly assess the difficulty level of a question and decide whether it is worth attempting or skipping.

3. Decision-making:
- Mock tests provide you with an opportunity to practice decision-making in a simulated exam environment.
- During the test, you will encounter questions that you may find challenging or unfamiliar.
- By practicing under timed conditions, you will learn to make quick decisions about whether to attempt these questions or move on to the next one.
- This decision-making process involves evaluating the potential time investment required for a question and weighing it against the potential reward in terms of marks.

4. Analyzing Mistakes:
- After taking a timed mock test, it is crucial to analyze your performance and identify areas where you made incorrect decisions.
- Reviewing your mistakes will help you understand the reasons behind your decision-making errors.
- By identifying patterns in your mistakes, you can work on improving your decision-making skills for future exams.

5. Confidence Building:
- Regularly practicing timed mock tests builds your confidence in making decisions during the exam.
- As you become more comfortable with the timing and decision-making process, you will feel more confident in selecting questions to attempt and skipping those you're unsure about.
- This increased confidence will ultimately lead to better performance in the actual exam.

In conclusion, taking timed mock tests is an effective strategy for improving your decision-making skills in selecting questions to attempt and skipping those you're unsure about. It helps you become familiar with the exam format, develop time management techniques, practice decision-making under timed conditions, analyze your mistakes, and build confidence for the actual exam. By regularly incorporating timed mock tests into your preparation, you can enhance your performance and increase your chances of success.