Praise for previous editions: "Extremely well-written ... the clearest book I have read in relation to two of the most difficult disciplines to understand in research...an absolute essential text for all students and beginner researchers." -BMA Medical Book Awards Programme "A spectacular approach to writing a book of this nature. I have found it to be very useful in my day-to-day work activities ... It gives a detailed orientation for beginners and a great review for those wanting to look up a topic without the exhausting details." -Jocelyn Murray, Epidemiologist, NASA "This is probably the clearest and best presented statistics book I have read. I will definitely be keeping a copy on my bookshelf!" -Clinical Oncology "An excellent book - clear and well written, providing a really good basic grounding in both statistics and epidemiology." -Nick Spencer, Professor of Child Health, Warwick University