This presentation discusses the roles of quantitative and qualitative research in modern marketing, the importance of relevant questionnaire design, discussion guide, and analysis techniques such as correlation, regression, and time series analysis. It also highlights how data can be collected and used to make informed business decisions. The presentation includes examples and good practices for questionnaire design and interview discussion guide. The limitations of correlation, regression, and time series analysis are also discussed. The subject of the presentation is market research, and it is relevant for students studying business and marketing. The presentation is available on Desklib, an online library for study material with solved assignments, essays, and dissertations.