EDU823 Email: bbcnoun@gmail.com Whatsapp: 08131667008 Which of these research designs is the most effective means in minimizing the threats to experimental validity and why? The pre-test only control group design because it equates experimental and control groups by randomization Which of these research designs is best used more of as a way of analyzing research data than a separate research method? The Casual – Comparative research design Which of these research designs is regarded as a data collection technique in which information is gathered from individuals called respondents by having them respond to questions Survey research design Which of these are desirable steps to be taken to ensure good quality of a questionnaire? Be careful of inadequate alternative e.g. Married\nII. Phrase questions so that they are appropriate for all the \nrespondents.\nIII. Design questions that will give a complete response.\nIV. Underline a word if you wish to indicate special emphasis\n I,II,III&IV In which of these types of interviews must the respondents fit their experiences and feelings into the researcher’s categories? Closed fixed response interview Which of these statements about sampling is TRUE? I. Random sampling ensures that the sample has identical representation of the population\nII. Characteristics of successive random sample drawn from the population are maintained\nIII. Sampling error does not suggest that a mistake has been made from the sampling process.\nIV. Sampling error refers to a statistical error that occur when selected samples does not represent the population\n III & IV Which of these types of interviews has the strength of its outline increasing the comprehensiveness of data collection? Interview guide approach In which of these types of interviews does “the interviewer decides sequence and wording of questions in the course of the interview”? Interview guide approach Which of these types of interviews can have the weakness of data organization and analysis quite difficult? Informal conversational interview What does this statement: “the conditions or characteristics that the experimenter manipulates, controls or observes” refers to in educational research? Variables Email: bbcnoun@gmail.com Whatsapp: 08131667008