Mona Chalabi discusses three questions to evaluate the reliability of statistics: 1) Does the data show uncertainty? 2) Can you see your demographic group represented? 3) How was the data collected? She argues that asking these questions can help identify "bad statistics" that lack context, omit parts of the population, or were gathered through flawed methods, leading to poor decision making. Understanding how to scrutinize statistics is important because governments and businesses often rely on numbers to set policies and strategies.