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## Sunday, July 21, 2013

### Dibrugarh University (M.Com - Distance) - Research Methodology and Statistical Analysis (Nov - Dec' 2010)

1.  (a) Substantiate the statement, ‘Research encompasses activities that increase the sum of human knowledge.
Or

2. (a) What are the degrees and types of correlation? How is Karl Pearson’s coefficient of correlation calculated?
Or
(b) What are the index numbers? How are they constructed and what are the main difficulties in their construction?

3.  (a)Explain the different approaches to probability. Under what condition is the classical approach not appropriate to employ?
Or
(b) The number of defects per unit in a sample of 330 units of manufactured product was found as follows:

 No. of Defect: 0 1 2 3 4 No. of Units: 214 92 20 3 1

Fit a Poisson distribution to the data and test for goodness of fit, (given e-0.439 =0.6447).

4.  (a) Memory capacity of 9 students was tested before and after training. State at 5% level of significance whether the training was effective from the following scores:

 Student 1 2 3 4 5 6 7 8 Before 10 15 9 3 7 12 16 17 After 12 17 8 5 6 11 18 20

Or
(b) Distinguish between the following:
Ø  Simple hypothesis and composite hypothesis.
Ø  Null hypothesis and alternative hypothesis.
Ø  One-tailed test and two-tailed tast.
Ø  Type I error and type II error.

5. (a) What are basic requirements of a good research report?
Or

(b) In a certain sample of 2000 families, 1400 families are consumers of tea.Out of 1800 Hindu families, 1236 families consume tea. Use Chi Square distribution to tea whether there is any significance between consumption of tea among Hindu and Non-Hindu families.