Sampling Techniques-Stratified Random Sampling (ISS (Statistical Services) Statistics Paper III): Questions 6 - 8 of 8

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Question number: 6

» Sampling Techniques » Stratified Random Sampling

Appeared in Year: 2010

Short Answer Question▾

Write in Short

What is PPS Sampling? Explain why such type of sampling is needed? Describe Lahiri’s method for PPS selection of sample.

Question number: 7

» Sampling Techniques » Stratified Random Sampling

Appeared in Year: 2012

Essay Question▾

Describe in Detail

Discuss the allocation of a sample to different strata in stratified sampling. Explain proportional allocation and hence obtain the variance of mean of a stratified sample under proportional allocation.

Explanation

For a population consisting of N sampling units it can be divided into k relatively homogeneous sub-groups of sizesEquation, Equation, …, Equation (called as strata) such that N=Equation.

Then a simple random sample of size Equation (i = 1, 2, …, k) is drawn from… (233 more words) …

Question number: 8

» Sampling Techniques » Stratified Random Sampling

Appeared in Year: 2013

Essay Question▾

Describe in Detail

Describe the principles of stratification. Explain how the allocation of sample size in different strata is made.

Explanation

Principles of stratification:

The principle of stratification is the division of the population in such a way that the elements within a stratum are as similar as possible and the means of the strata are as different as possible.

Auxiliary information (past or some other information) related to the character… (278 more words) …

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