Neil J. Salkind 
100 Questions (and Answers) About Research Methods [PDF ebook] 

‘How do I create a good research hypothesis?”How do I know when my literature review is finished?”What is the difference between a sample and a population?”What is power and why is it important?’In an increasingly data-driven world, it is more important than ever for students as well as professionals to better understand the process of research. This invaluable guide answers the essential questions that students ask about research methods in a concise and accessible way.