Bhavnagar University 2007 B.Com BUSINESS STATISTICS - Question Paper

BUSINESS STATISTICS

Time : 3 hours Maximum : 100 marks
PART A — (5 ? eight = 40 marks)
ans any 5 ques..
All ques. carry equal marks.
1. What are the characteristics of statistics?
2. Define arithmetic mean. elaborate its uses?
3. What are the uses of quartile deviation?
4. What are the different methods of measuring skewness?
5. Explain the different methods of finding pattern.
6. Compute the Geometric mean of the subsequent series :
Marks : 0-10 10-20 20-30 30-40 40-50
No. of students : 5 7 15 25 8
7. Calculate mean deviation about median for the items :
7 four 10 nine 15 12 seven nine 7.
8. Calculate Karl Pearson's coefficient of skewness :
X : 1 3 4 5 6 7 9 10
f : 1 4 10 25 13 7 6 4
PART B — (4 ? 15 = 60 marks)
ans any 4 ques..
All ques. carry equal marks.
9. Explain the role of statistics in Business Management.
10. Define coefficient of variation. Why is it the most popular relative measure of dispersion?
11. Discuss the characteristics of Index Numbers.
12. Calculate A.M., G.M. and H.M.
Interval : 0-19 20-39 40-59 60-79 80-99
Frequency : 5 15 35 15 10
13. The weekly salaries of a group of employees are provided in the subsequent table. obtain the mean and standard deviation of the salaries :
Salary (Rs.) : 75 80 85 90 95 100
No. of persons : 3 7 18 12 6 4
14. Do you think X and Y are correlated? provided :
X : 163 178 183 168 173 188 198 193 203 213
Y : 210 190 180 200 200 190 160 180 150 150
15. Calculate Fisher's Ideal Index Number :
Commodity 2000 2005
Price (Rs.) Qty. Price (Rs.) Qty.
A 2 74 3 82
B 5 125 4 140
C 7 40 6 33

Earning:   Approval pending.