Calicut University 2007 B.Com Computer Science business statistics - Question Paper
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D 40001 (Pages: 3) Name.....................................
Reg. No.................................
FINAL YEAR B.Com. DEGREE EXAMINATION SEPTEMBER 2007
Commerce Paper I - BUSINESS STATISTICS Time : Three Hours Maximum : 80 Marks
Answer any ten of the following. Each question carries 1 mark. 1. Define statistics.
2. What do you mean by a histogram ?
3. What do you mean by an array ?
4. State any two demerits of median.
5. Defme a Combination.
6. What is a questionnaire ?
7. Define correlation.
8. What is Cartogram?
9. Define statistical unit.
10. What do you mean by range ?
11. State the addition theorem of probability.
12. Define Geometric mean.
(10 x 1 = 10 marks)
Answer any ten questions.
Bach question carries 4 marks.
13. State the difference between mean deviation and standard deviation.
14. Explain irregular variation.
Turn over
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15. State the merits of mode.
16. Distinguish between primary and secondary data.
17. What are the objectives of tabulation of data ? .
i
18. Explain the importance of time series analysis.
19. Prepare a blank table, showing distribution of population, according to Age, Sex and Literacy.
20. Calculate mode from the following data :
|
Size |
Frequency |
|
10-19 |
10 |
|
20-29 |
12 |
|
30-39 |
18 |
|
40-49 |
30 |
|
50-59 |
16 |
|
60*69 |
6 |
|
70-79 |
8 |
21.Draw a histogram and frequency polygon from the following data :
Marks No. of Students
0-10 ... 4
10-20 ... 6
20-40 ... 14
40-50 ... 16
50-60 ... 14
60-70 ... 8
70-90 ... 16
90-100 ... 5
22. The arithmetic mean and standard deviation of 50 items were calculated by a student as 40 and 12 cm..respectively. But while calculating an item, 19 was misread as 49. Find the correct, mean and standard deviation.
23. Karl Pearsons coefficient of skewness of a distribution is +0.32, standard deviation is 6.5 and mean is 29.6. Find the Mode and Median of the distribution.
24. Find out the trend values by the method of least squares.
Years : 1 2 3 4 5
Sales (in Rs. lakhs) : 10 15 12 14 20
(10 x 4 = 40 marks)
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Part C
Answer any two questions.
Each question carries 15 marks.
25. What is primary data ? Which are the different methods employed for collecting primary data ?
26. From the following data, find Fishers Index number and show that Time and Factor Reversal tests are satisfied by it.
|
Commodity |
Base Year Price Qty. |
Current Year Price Qty. | ||
|
A |
8 |
10 |
10 |
12 |
|
B |
10 |
12 |
12 |
8 |
|
C |
5 |
8 |
5 |
10 |
|
D |
4 |
14 |
3 |
20 |
|
E |
20 |
5 |
25' |
6 |
27. From the following data, calculate Karl Pearson's coefficient 'of skewness :
Marks More than AJo. of students
0 ... 150
10 ... 140
20 ... 100
30 ... 80
40 ... 80
50 ... 80
60 * ... 30
70 ... 14
80 ... 0
12 x 15 = 30 marks)
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Attachment: |
| Earning: Approval pending. |
