Types of Sampling Methods

What is the ideal sampling plan that provides an unbiased estimate of the target population’s properties?

• Random Sampling

• Judgmental Sampling

• Systematic Sampling

• Stratified Sampling

• Convenience Sampling

What is the opposite of random sampling?

• Random Sampling

• Judgmental Sampling

• Systematic Sampling

• Stratified Sampling

• Convenience Sampling

What type of sampling falls in between random and judgmental sampling?

• Random Sampling

• Judgmental Sampling

• Systematic Sampling

• Stratified Sampling

• Convenience Sampling

What is a combination of systematic and judgmental sampling?

• Random Sampling

• Judgmental Sampling

• Systematic Sampling

• Stratified Sampling

• Systematic-Judgmental Sampling

What is the method of sampling where sample sites are selected using criteria other than minimizing sampling error?

• Random Sampling

• Judgmental Sampling

• Systematic Sampling

• Stratified Sampling

• Convenience Sampling

What is the purpose of sample preservation?

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What physical processes may degrade a sample?

• Volatilization

• Diffusion

• Adsorption on surfaces

What are possible chemical changes that can occur in a sample?

• Photochemical reactions

• Oxidation

• Precipitation

What biological processes can affect a sample?

• Biodegradation

• Enzymatic reactions

What common steps are involved in sample preservation?

• Use of proper containers

• Temperature control

• Addition of preservatives

• Observance of recommended sample holding time