You are about to embark on a year-long study of customer service training for sales assistants in two national supermarket companies. The purpose of the research is to compare the way in which the training develops and its effectiveness. What measures would you nAgree with a friend to watch the same television documentary. 

a. Does the documentary use quantitative, qualitative or mixed methods?
b. To what extent is the nature of the documentary exploratory, descriptive, explanatory, evaluative or a combination of these?
c. What other observations can you make about the research strategy or strategies the documentary makers have used in their programme? Do not forget to make notes regarding your reasons for your answers to each of these questions and to discuss these answers with your friend.eed to take in the research design stage to ensure that your results were valid?