Sample Design A school board at a local community college is...

Name: Problem 32, Chapter 1: Statistics Informed Decisions Using Data
Uploaded: 2020-10-29T15:17:36-08:00
Duration: 1 min 43 s
Channel: Harsh Gadhiya
Description: Sample Design A school board at a local community college is considering raising the student services fees. The board wants to obtain the opinion of the student body before proceeding. Design a sampling method to obtain the individuals in the sample. Be sure to support your choice.

Sample Design A school board at a local community college is considering raising the student services fees. The board wants to obtain the opinion of the student body before proceeding. Design a sampling method to obtain the individuals in the sample. Be sure to support your choice.

Key Concepts

Stratified Sampling

Stratified sampling divides the population into distinct subgroups or strata—such as class levels, majors, or other relevant demographic factors—and then randomly selects samples from each subgroup. This method is particularly useful when there are known differences within subpopulations, ensuring that the opinions of all segments of the student body are adequately represented.

Probability Sampling

Probability sampling is a technique where each member of the population has a known and non-zero chance of being included in the sample. This concept is fundamental when designing any study that aims to make inferences about a larger population because it minimizes the risk of selection bias and allows for generalizable results.

Random Sampling

Random sampling involves selecting individuals from a population entirely by chance, which increases the likelihood that the sample will be representative of the student body. This method is important as it ensures that every student has an equal probability of selection, thereby minimizing biases that could affect the outcomes of the research.

Representativeness

Representativeness refers to the degree to which a sample accurately mirrors the characteristics of the larger population it is drawn from. Achieving a representative sample is crucial when collecting opinions that will impact decisions affecting the entire student body, as it ensures that the findings reflect diverse viewpoints and avoid the influence of bias.

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