Bhavnagar University 2008 M.Phil Commerce Research Methodology II - Question Paper

M.Phil. DEGREE EXAMINATION, MAY 2008.
Commerce
RESEARCH METHODOLOGY — II — TECHNIQUES

ans any 5 ques..
(5 ? 20 = 100)
1. What is a ‘‘Statistical Average’’? elaborate the desirable properties for an avg. to possess? Which of the avg. possesses these properties?
2. Distinguish ranging from ‘‘skewness’’ and ‘‘kurtosis’’ and bring out their importance in describing frequency distribution.
3. Write short notes on :
(a) Semantic differential scale.
(b) Likert kind scale.
4. Explain clearly about run Kruskal-Wallis and Mann-Whitney test.
5. Calculate correlation co-efficient and regression coefficient for the subsequent data :
X : 2 4 6 8 10 12 14
Y : 4 2 5 10 4 11 12
Find the estimate of y when x = 13.
6. Set up ANOVA table for the subsequent info relating to 3 drugs testing to judge the effectiveness in reducing blood pressure for 3 various groups of people :
Amount of Blood pressure reduction in Millimeters of Mercury
Drug
X Y Z
Groups of people A 14 10 11
15 9 11
B 12 7 10
11 8 11
C 10 11 8
11 11 7
Do the drugs act differently? Are the various groups of people affected differently? Is the interaction term significant? ans the above ques. taking a significant level of 5%.
7. In a certain sample of 2000 families, 1400 families are consumers of tea. Out of 1800 Hindu families, 1236 families consume tea. Use test and state whether there is any significant difference ranging from consumption of tea among Hindu and Non-Hindu families.
8. The sales data of an item in 6 shops before and after a special promotional campaign are :
Shops : A B C D E F
Before the promotional campaign : 53 28 31 48 50 42
After the campaign : 58 29 30 55 56 45
Can the campaign be judged to be a success? Test at 5% level of significance. Use paired t-test as well as A-test.
9. The subsequent table indicates the vests of a paired-comparison preference test of 4 cold drinks from a sample of 200 persons :
Name Coca Cola Limca Gold Spot Thumps up
Coca cola – 60* 105 45
Limca 160 – 150 70
Goldspot 75 40 – 65
Thumps up 165 120 145 –
* To be learn as 60 persons preferred Limca over Coca cola.
(a) How do these brands rank in overall preference in the provided sample?
(b) Develop an interval scale for the 4 varieties of cold drinks.

Earning:   Approval pending.