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# Tamil Nadu Open University (TNOU) 2006 B.A Economics Elementary Statistics for Economists - exam paper

Friday, 05 July 2013 04:40Web

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10.    What are the four components of time series? Estimate the trend line from the following data.

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11.    Describe the method adopted in the measurement of National Income of India. What are the major difficulties encountered in such measurement?

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12.    Explain the classification of data using examples. What are the advantages of classification of data?

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B.A. DEGREE EXAMINATION - JANUARY, 2006.

Economics

ELEMENTARY STATISTICS FOR ECONOMISTS Time : 3 hours    Maximum marks : 75

SECTION A (3 x 5 = 15 marks)

1.    What do you understand by primary data? Explain anyone method of getting it.

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2,    What are sampling errors? Mention its typeB. Can sampling errors be avoided completely.

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3.    What is time reversal test? Find whether Laspeyre's index satisfies this test.

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4.    Write a short note on cartograms.

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5.    Define skewness. What are its types? Explain graphically.

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SECTION B (4 x 15 = 60 marks)

6.    (a) Define Arithmetic Mean, Mention the important properties of Arithmetic Mean.

(b) Compute Arithmetic Mean from, the following data.

Marks:    0-10 10-20 20-30 300 40-50 50-60

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7.    Describe the merits and demerits of various measures of dispersion.

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8.    Describe stratified random sampling technique. What are its merits and demerits?

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9.    Obtain the two lines of regression from the following data:

X: 4 5 6 8 11

Y: 12 10 8 7 5

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X: 4 5 6 8 11

Y: 12 10 8 7 5