Algebra 2: Types of Surveys and Samples

Study Notes

Types of Studies

Observational Study: Researchers observe subjects without assigning choices or conditions, focusing purely on the natural behaviors or characteristics.
Experimental Study: Researchers assign subjects randomly to different conditions or factors to compare outcomes, allowing for controlled experimentation.

Types of Surveys

Sample Survey: Involves collecting data from a subset of the population rather than the entire group, allowing for manageable data collection.
Census Survey: Requires data collection from every member of the population, providing a complete overview of all subjects.

Types of Sampling Methods

Voluntary Response Sample: Involves inviting a large group to respond; all willing participants are included, which may lead to bias due to self-selection.
Convenience Sample: Comprises individuals who are easily accessible or convenient to the researcher, potentially compromising representativeness.

Random Sampling Techniques

Systematic Random Samples: Aims to introduce randomness into the selection process, often using a fixed interval or pattern to choose participants.
Simple Random Sample: Ensures every individual in the population has an equal chance of being selected, promoting fairness and unbiased representation.

Cluster and Stratified Sampling

Cluster Samples: Involves dividing the population into smaller, representative clusters and randomly selecting entire clusters for the study.
Stratified Samples: Involves dividing the population into distinct groups based on shared characteristics and randomly sampling from each group to ensure representation across key segments.

Judgmental Sampling

Judgment Samples: An unscientific method where a sample is deemed "typical" based on the researcher's subjective judgment, lacking formal selection processes.

Description

Test your understanding of various types of surveys and sampling methods in this algebra 2 quiz. Learn the differences between observational studies, experimental studies, and sample surveys through flashcards that define each concept.