CE 2018
B.Sc. Examination, November / December
Subject: Statistics
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(Essay Type)
Note: Answer ALL questions.
9 (a) Distinguish between sampling and non-sampling errors. Give the sources of non-sampling errors.
OR
(b) Show that in SRSWOR the probability of selecting a specified unit from the population at any given draw is equal to the probability of selecting it at the first draw.
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10 (a) Define stratified random sampling. Explain the principles of stratification. Also give its merits and demerits.
OR
(b) Define Cost function. With a cost function C = a + Snhch, prove that the variance of the estimated mean ?st is minimum when nh is proportional to NhSh /vCh.
11 (a) Describe Leontief's method of estimating price elasticity of demand for time series data and its limitations.
OR
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(b) What is meant by (i) Base shifting (ii) Deflating (iii) Splicing of Index Numbers? Explain and illustrate.
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