Sampling Methods

What is the purpose of taking a sample from a population?

• To measure the entire population

• To ensure unbiased results

• To increase the population size

• To save time and money

What is the ideal characteristic of an unbiased sample?

• It includes only a specific group of objects

• It is representative of the population

• It has a known bias

• It is taken from a convenient location

What is the main disadvantage of simple random sampling?

• It is not representative of the population

• It requires a good sampling frame

• It is biased towards certain groups

• It is difficult and expensive

What is the main advantage of convenience sampling?

• It is easy to administer

• It eliminates self-selection bias

• It is representative of the population

• It is quick and cheap

How is systematic sampling different from simple random sampling?

• It is more biased towards certain groups

• It includes every object in the population

• It is a good approximation of a random sample

• It is taken at random intervals

What is the main disadvantage of cluster sampling?

• It is difficult to administer

• It is more biased towards certain groups

• It can lead to non-representativeness

• It is not representative of the population

How is stratified sampling different from cluster sampling?

• It is more convenient and practical

• It includes every object in the population

• It is taken at random intervals

• It is chosen specifically to represent different characteristics

What is the main advantage of stratified sampling?

• It is a good approximation of a random sample

• It leads to a very good random representative sample

• It is quick and cheap

• It eliminates self-selection bias

What should be taken into account if a sample has known bias?

• It should be used to save time and money

• It should be used to increase the population size

• It should be taken into account in analysis and reporting

• It should be ignored in analysis and reporting

What should be the main consideration when choosing a sampling method?

• The known bias of the sample

• The convenience of the method

• The resources available

• The complexity of administration