Why is it so important that a statistical study use a representative sample? Bri
ID: 3122524 • Letter: W
Question
Why is it so important that a statistical study use a representative sample? Briefly describe four common sampling methods. Why is it so important that a statistical study use a representative sample? A. A non-representative sample only provides acceptable results when obtained using convenience sampling. B. Representative samples are necessary because it is important that every sample of a given size has an equal chance of being selected. C. Representative samples are more accurate than non-representative samples. D. If the sample fairly represents the population as a whole, then it is reasonable to make inferences from the sample to the population. Briefly describe four common sampling methods. Choose the correct answer below. A. Box sampling: Normal sampling: Systematic sampling: Stratified sampling: B. Grouped sampling; Systematic sampling: Box sampling: Stratified sampling C. Simple random sampling: Systematic sampling: Convenience sampling: Stratified sampling D. Complex random sampling: Simple random sampling: Standard sampling Convenience.Explanation / Answer
Answer to the question:
1. D is the right answer. Sample should be right representation of the population
2. C is the right answer
Systematic Sampling - Put subjects in some order and then every nth one is chosen.
Stratified Sampling – Population divided into groups and then samples are randomly selected each group.
Cluster Sampling - Population is divided into groups and then groups are randomly selected and all subjects in the selected groups participate
Convenience Sampling - uses results that are readily available
Simple Random Sample (SRS) - every member of the population has equal chance of being picked.- most common method
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