Sampling Techniques (ISS Statistics Paper III): Questions 5 - 11 of 30

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Question number: 5

» Sampling Techniques » Concepts in Sampling

Appeared in Year: 2009

Essay Question▾

Describe in Detail

What do you mean by sampling frame? Why do you need it? Give reasons for preferring the sampling to complete enumeration.

Explanation

Sampling frame is a list of all the elements or things in the population from which the sample is drawn.

It is a list of all those within population which can be sampled, and may include individuals, households or institutions. To cover the population there should be some list, map… (283 more words) …

Question number: 6

» Sampling Techniques » Stratified Random Sampling

Appeared in Year: 2009

Short Answer Question▾

Write in Short

Explain the principle of stratification. How would you determine the best mode of stratification?

Question number: 7

» Sampling Techniques » Simple Random Sampling With and Without Replacement

Appeared in Year: 2009

Essay Question▾

Describe in Detail

Describe the procedure of drawing a simple random sample of size n without replacement from a finite population of size N. obtain the probabilities of drawing specified sample in simple random sampling with and without replacement.

Explanation

Procedure of drawing Simple random sampling without replacement (SRSWOR):

In SSWOR once an element is selected as a sample unit, it will not be replaced in the population pool. The selected sample units are distinct.

A sample of size n is collected without replacement from the population of size N… (647 more words) …

Question number: 8

» Sampling Techniques » Cluster Sampling With SRS - Intra-Class Correlation Coefficient

Appeared in Year: 2009

Short Answer Question▾

Write in Short

Explain cluster sampling.

Question number: 9

» Sampling Techniques » Two-Stage Sampling With Equal Number of Second Stage Units

Appeared in Year: 2009

Essay Question▾

Describe in Detail

Distinguish between two-stage and two-phase sampling schemes. Give suitable examples.

Explanation

Two Stage Sampling:

All elements are surveyed in cluster sampling and efficiency in cluster sampling depends on size of the cluster. As the size increases, the efficiency decreases.

Rather than enumerating all the sampling units in the selected clusters, one can get better and more efficient estimators by resorting to… (285 more words) …

Question number: 10

» Sampling Techniques » Concepts in Sampling

Appeared in Year: 2010

Essay Question▾

Describe in Detail

What precautions would you take in planning for a sample survey?

Explanation

Precautions to be taken for planning sample survey:

  1. Objectives of the survey: The first step is to define clearly the objective of the survey. The objective should be kept easy so that the people working for the survey easily understand it. The hypothesis being tested and the outcomes that will… (664 more words) …

Question number: 11

» Sampling Techniques » Simple Random Sampling and Systematic Sampling

Appeared in Year: 2010

Short Answer Question▾

Write in Short

A hypothetical population has the population units in linear trend given by Yi = a +bi (i = 1, 2, … N).

Show that: V ( y̅WR)=b212n(N+1)(N1)

V ( y̅WOR)=b212(k1)(N+1) where N = nk

V ( y̅SY)= b212(k21)

Hence, deduce that V(ySY):V(yWOR):V(yWR)=1n:1:n

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