शोध पत्र या शोध रिपोर्ट पढ़ते समय अक्सर संक्षिप्तीकरण 'viz.' देखने को मिलता है, जिसका अर्थ है:

A researcher wants to explore the effect of possible factors on the organization of effective computer-based learning interventions in schools. Which research method is most appropriate for this study?

Which of the following steps is NOT essential while designing a questionnaire?