Resources that can improve the understanding of statistical data relevant to UPSC topics include textbooks on statistics, online courses, and data interpretation guides. Engaging with practical examples through case studies can enhance analytical skills. Utilizing government publications, which often provide statistical data on various sectors, can also be beneficial for familiarization with real-world applications. Moreover, practicing data-related questions from previous UPSC papers can solidify comprehension and application skills. Candidates should aim for a balanced approach, combining theory with practical analysis to excel in quantitative sections of the exam.