Tamil Nadu Open University (TNOU) 2009 B.A Economics Elementary statistics for - Question Paper
WK 4
UG-636 BEC-2B.A. DEGREE EXAMINATION -JUNE, 2009
First Year (AY 2003-04 to CY 2005 batches only) Economics ELEMENTARY STATISTICS FOR ECONOMICS
Time : 3 hours Maximum marks : 75
SECTION A (3 x 5 = 15 marks)
Answer any THREE questions.
1. What are the limitations of statistics?
2. What is simple bar diagram? Explain with an illustration.
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3. What is dispersion? What are the important measures of dispersion?
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4. Explain the need for sampling with examples.
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5. What is time series analysis? What are its uses? P-Z U-hEh9j b oOp oOm? Ap UW PW0 SU?
SECTION B (4 x 15 = 60 marks)
Answer any FOUR questions.
6. Draw the histogram for the following data :
Class : 30-35 35-40 40-45 45-50 50-55 Frequency : 10 30 55 22 8
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: 30- 35-40 40-45 45-50 50-55
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A0ms : 10 30 55 22 8
7. ompute the mode from the following data :
Class: 0-20 20-40 40-60 60-80 80-100
Frequency : 3 17 27 20 9
A0ms 3 17 27 20 9 :
8. Compute mean deviation from mean for the following data :
Size : 0-10 10-20 20-30 30-40 40-50 50-60 60-70
Frequency : 7 12 18 25 16 14 8
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: 0-10 10-20 20-30 30-40 40-50 50-60 60-70
a* sus : 7 12 18 25 16 14 8
9. What is skewness? What are its types? Explain any two measures of skewness.
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10. Calculate Karl Pearsons correlation coefficient for the data given below.
x : 60 62 64 66 68 70 72 y : 61 63 63 63 64 65 67
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x : 60 62 64 66 68 70 72
y: 61 63 63 63 64 65 67
11. Discuss the tests to be satisfied by a good index number.
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12. Write an essay on population census of India.
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4 UG-636
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