Question

1

A. Explain why cluster sample is a probability sample design?

B. What are the advantages and disadvantages of cluster sampling?

C. Describe a situation where you would use cluster sampling.

Answer #1

A)in cluster analysis,researcher divides the population into separate groups, called clusters. Then, a simple random sample of clusters is selected from the population. So cluster sample is a probability sample design.

B) advantages of cluster sampling

#very useful when population is large

#economically efficient

Disadvantages of cluster sampling

#standard error of the estimate is likely to be large

#representation is likely to become an issue

C)

cluster sampling is used when researcher can't get information about the population as a whole but they can get information about the clusters. For example

If researcher want to survey academic performance of high school students then he can divide the total reason into clusters.

Please like ?

Why do social scientists use cluster sampling? What are its
advantages and drawbacks?

Describe a situation where you would consider the use of
cluster sampling.

Please, develop and explain a situation where you would apply
probability theory, or specify a probability distribution. Mention
and explain the reason for his selection, and the advantages and
disadvantages of the use of probabilities are in your example

Part 3:A: Explain product or service design activities
and what is the objectives of design.
B: Explain standardization and what is advantages and
disadvantages of standardization.

Epidemiology
Suppose the sample size for a survey design based on a Simple
Random Sampling is n=400.A survey has been designed by a cluster
sample. What sample size would be required for this survey?.Suppose
you further wish to adjust for the sample sizes to account for
Recording errors,non-responses and other contigencies, briefly
describe how you would determine the sample size for this
consideration.Hence determine the sample size,assuming a cluster
sampling design?

What are the advantages and disadvantages of
probability-based sampling designs and non-probability-based
sampling designs?

A) Distinguish between nonprobability and probability samples
and compare their advantages and disadvantages. Which are used for
qualitative and which for quantitative studies?
1) Identify and describe two types of non-probability sampling
methods and two types of probability sampling methods
2) Discuss how sample size requirements differ between
qualitative and quantitative studies.
B) Identify phenomena/variables that lend themselves to
self-reports, observation, and biophysiologic measurement and
discuss each of these types of data collection.

For stratified and cluster designs would you expect the design
effect to be greater than, less than, or approximately equal to
one? Clearly explain why you expect this.

1. Why is Threadless so successful?
2. What competitive advantages do they have over comparable
design firms using traditional strategies for product design?
3. What is the logic of crowdsourcing and why has it caught on
in so many areas and for so many applications?
4. What are some potential traps and limitations of
crowdsourcing efforts?
5. Identify at least two other businesses, or business
functions, that you think could achieve breakthrough gains via the
use of crowdsourcing.

You are a researcher working for an educational research firm.
Your firm was asked to conduct a satisfaction survey among the
parents of students attending the School District public schools.
Your boss has asked you to develop a sampling design for this
survey.
For this survey, you are asked to select a representative sample
of parents. When you answer the questions, keep the following in
mind:
Assume that you have unlimited authority to access all
the information you may need...

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