A viewer, Lindsay, worried about lacking sufficient mathematical background for a Master's in Applied Mathematics, despite having an economics degree and a math minor. The YouTuber recommends several resources: "All the Mathematics You Missed," Ross's probability textbook, Wackerly's "Mathematical Statistics with Applications" (and its solutions manual), and Hammock's "Book of Proof" for improving mathematical maturity. Udemy courses on set theory, functions, advanced calculus, and abstract algebra are also suggested. * Recommended Books: * "A First Course in Probability" by Sheldon Ross (a standard, though terse, probability textbook). * "All the Mathematics You Missed..." by Thomas Garrity (for motivation and broad mathematical exposure). * Lindsay's Concern: Lack of preparedness for a Master's in Applied Mathematics, specifically in probability and real analysis, despite having an economics major and math minor. * Key Strategy: Proactive preparation before starting graduate school is crucial. Consistent work with the recommended textbooks and resources will significantly improve her readiness. * "Mathematical Statistics with Applications" by Wackerly (the book Lindsay is already using; a solutions manual is recommended). * Additional Resources: Udemy courses on set theory, functions, advanced calculus, and abstract algebra (to improve mathematical maturity and proof-writing skills). * "Book of Proof" by Richard Hammack (a free online resource for learning proof writing).