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On a large college campus first-year students and sophomores live in dorms located on the eastern part of the campus and juniors and seniors live in dorms located on the western part of the campus. suppose you want to collect student opinions on a new housing structure the college administration is proposing and you want to make sure your survey equally represents opinions from students from all years. (a) what type of study is this? (b) suggest a sampling strategy for carrying out this study.

Respuesta :

Answer:  

a. This type of study is known as probability sampling.

b.  Since we’d like to make sure the survey represents opinions from students of all ages, we can use stratified sampling.

Probability Sampling

  • In probability sampling each element of the population has an equal chance of being selected for the sample.  
  • Probability sampling helps us to create a sample that is truly representative of the population.  
  • A sample that truly represents the population ensures that the statistical conclusions are valid.

Stratified Sampling

In stratified sampling, the population is divided in different classes that are known as strata. Once this classification has been done, we randomly select a sample.

Since our objective for the survey is to collect opinions from students of all years, we can divide the student population into four strata based on age, and select a probability sample from each stratum.

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