RM&IPR Module 3

What is the primary purpose of sampling in research?

• To study every member of the population

• To select a representative subset of the population

• To eliminate all research errors

• To make research more expensive

The entire group about which researchers draw conclusions is called

• Sample

• Population
  
  

• Sampling frame

• Cohort
  
  

A list of all elements in a population from which the sample is drawn is called

• Sampling error
  
  

• Sampling frame

• Sampling bias
  
  

• Sampling Unit
  
  

Which of the following is NOT a characteristic of good sampling?

• Representativeness

• Adequacy

• Bias
  
  

• Accuracy
  
  

Sampling is preferred over a census when

• The population is very small

• Time and cost are constraints

• Complete accuracy is required

• Every population member is easily accessible

Which sampling method gives every member of the population an equal chance of selection?

• Simple random sampling

• Convenience sampling

• Judgmental sampling
  
  

• Snowball sampling

In systematic sampling, the selection interval 'k' is calculated as

• Population size / Sample size

• Sample size / Population size

• Population size × Sample size

• Population size + Sample size

Stratified random sampling is most useful when

• The population is homogeneous
  
  

• The population has distinct subgroups (strata)
  
  

• Quick results are needed

• The sample size is very small

Cluster sampling differs from stratified sampling because

• Clusters are heterogeneous, while strata are homogeneous

• Clusters are selected randomly, while strata are not
  
  

• It requires a complete list of the population
  
  

• It cannot be used in large populations

Which probability sampling method is commonly used for geographically dispersed populations?

• Simple random sampling

• Systematic sampling
  
  

• Cluster sampling
  
  

• Quota sampling