Lidia wants to use a structured interview in her research. Which of the following can she employ?* Self-completed questionnaire Telephone questionnaire Face-to-face questionnaire None of the above If Ana is interested in conducting a research of a descriptive nature, which type of interviews do you suggest she should use? * Semi-structured interviews Unstructured interviews Structured interviews Two of the above The reliability of Sami's questionnaire about his newly opened restaurant's services was negatively affected by the responses of his friends that dined in it. This is referred to as: Uninformed responses Bias Socially desirable responses All of the above Ghassan needed to collected secondary from organizations' communications such as emails and memos. What is the type of secondary data that he has collected? * Survey data Multiple source data Two are correct Document text data When the questionnaire covers all the needed investigative questions for a specific research, this is referred to as: * Construct validity Content validity Internal validity Criterion-related validity One-off surveys that are very specific in their subject-matter are referred to as: Census Continuous surveys Ad hoc surveys Two of the above