Research Design and Methodology for Retail Sector — DU B.Voc – Retail Management & IT Previous Year Question Papers

Attempt five questions in total. 1. What do you mean by Research ? What are the different types of research ? 9+9 2. What do you mean by population and sample in a research study ? Discuss the difference between probability and non-probability sampling. 9+9 3. What are the various measurement scales used in research ? What are the various steps in research process ? 9+9 What is t-Test and when it is used ? The mean life of a random sample of 10 light bulbs was found to be 1456 hours with standard deviation of 423 hours. A second sample of 17 light bulbs chosen at random from a different batch showed a mean life of 1280 hours with standard deviation of 398 hours. Is there a statistically significant difference between mean life of the two batches of light bulbs. Test at 5% level of significance (the critical t-values are ± 2.086). 9+9 What do you mean by hypothesis testing ? How are parametric tests different from non-parametric tests ? 9+9 ‘Having an appropriate research design is important for success of research in the absence of which the purpose may be defeated.’ Explain with example. 9+9 (a) What is the difference between mean and median ? Explain with example. 9 (b) During a survey, six students were asked how many hours in a day they study at home ? Their arswers were 2, 6, 5, 3, 2 and 3 hours. Find the mean and the standard deviation. 9