This is an intermediate level post-calculus text on mathematical and statistical methods, directed toward the needs of chemists. It has developed out of a course that I teach at the University of Massachusetts Dartmouth for thirdyear undergraduate chemistry majors and, with additional assignments, for chemistry graduate students. However, I have designed the book to also serve as a supplementary text to accompany undergraduate physical and analytical chemistry courses and as a resource for individual study by students and professionals in all subfields of chemistry and in related fields such as environmental science, geochemistry, chemical engineering, and chemical physics. I expect the reader to have had one year of physics,.