Alagappa University 2007 B.B.A BUSINESS STATISTICS - Question Paper

DISTANCE EDUCATION
B.B.A. (CS) DEGREE EXAMINATION, DECEMBER 2007.


BUSINESS STATISTICS


(2005 onwards)
Time : 3 hours Maximum : 100 marks

PART A — (5 ? eight = 40 marks)
ans any 5 ques..


1. Mention the importance of Statistics in business and commerce.

2. Explain the meaning and scope of Statistics.

3. Find out Harmonic Mean :
Family : 1 2 3 4 5 6 7 8 9 10
Income : 85 70 10 75 500 8 42 250 40 36

4. What is classification of statistical data? elaborate the methods used for classification?

5. Calculate Mean deviation from mean :
Height (cm) : 158 159 160 161 162 163 164 165 166
No. of persons : 15 20 32 35 33 22 20 10 8
6. What is mean by Time Series? elaborate its uses?

7. Calculate standard deviation :
Class : 0-10 10-20 20-30 30-40 40-50 50-60 60-70
Frequency : 8 12 17 14 9 7 4

8. Calculate coefficient of correlation :
X : 12 9 8 10 11 13 7
Y : 14 8 6 9 11 12 13



PART B — (4 ? 15 = 60 marks)
ans any 4 ques..


9. From the subsequent details obtain quartile deviation and its coefficient :
Marks : 0-10 10-20 20-30 30-40 40-50 50-60
Frequency : 3 9 15 30 18 5

10. Calculate Mean and Mode of the subsequent data :
X : 15 20 25 30 35 40 45 50
f : 4 12 30 60 80 90 95 97

11. Compute the Bowley's measure of skewness for subsequent data :
Commission No. of salesman
100 – 120 4
120 – 140 10
140 – 160 16
160 – 180 29
180 – 200 52
200 – 220 80
220 – 240 42
240 – 260 23
260 – 280 17
280 – 300 7

12. Calculate the coefficient of rank correlation of 10 students in 2 subjects :
Statistics : 3 5 8 4 7 10 2 1 6 9
Economics : 6 4 9 8 1 2 3 10 5 7

13. What are the different method of collecting primary data and secondary data?

14. Calculate Karl Pearson's coefficient of correlation from the subsequent data :
X : 50 53 63 71 77 83 86 87 89 92
Y : 57 37 82 52 65 68 77 91 83 86

Earning:   Approval pending.