Yes, solving previous year papers can help in improving the ability to analyze and interpret data or graphs.

Introduction
Solving previous year papers is an effective way to prepare for exams, as it provides an opportunity to practice and familiarize oneself with the exam format, types of questions, and the level of difficulty. When it comes to subjects like mathematics or science, solving previous year papers can particularly enhance one's ability to analyze and interpret data or graphs.

Enhances familiarity with data presentation
Solving previous year papers exposes aspirants to various types of data presentations, such as tables, bar graphs, line graphs, pie charts, etc. By regularly analyzing and interpreting such data, candidates become familiar with the different ways in which information can be represented. This familiarity helps to develop a systematic approach towards analyzing and interpreting data and graphs.

Improves understanding of data patterns
Previous year papers often include questions that require candidates to identify patterns or trends in data. By solving these papers, aspirants get ample practice in recognizing patterns, understanding their significance, and drawing meaningful conclusions from them. This process improves their ability to analyze data and graphs effectively.

Develops problem-solving skills
Solving previous year papers involves solving complex problems based on data or graphs. This process requires candidates to apply their analytical skills and logical reasoning to arrive at the correct solution. Regular practice of such problems enhances problem-solving abilities, as candidates learn to break down complex problems into simpler, manageable steps.

Boosts time management skills
UPSC exams are known for their time constraints, and solving previous year papers can help aspirants improve their time management skills. By solving questions based on data or graphs within a stipulated time frame, candidates learn to allocate time efficiently for each question. This skill is crucial for effectively analyzing and interpreting data or graphs during the actual exam.

Conclusion
Solving previous year papers is an invaluable tool for UPSC aspirants, especially when it comes to improving their ability to analyze and interpret data or graphs. Regular practice not only enhances familiarity with data presentation but also improves understanding of patterns, problem-solving skills, and time management abilities. Therefore, aspirants should make it a part of their preparation strategy to solve previous year papers to excel in the UPSC exams.