Why is it important to use a representative sample in research?

Which of the following best describes a representative sample?

What is a key characteristic of a representative sample in research?

Which of the following is a benefit of using a representative sample in research?

Generalization and Bias with Representative Samples

Example of a Non-Representative Sample

Example of a Representative Sample

Standard Deviation

What is the primary characteristic of a representative sample?

A researcher wants to study stress levels among all university students at a large campus. She recruits participants by posting a sign-up sheet only in the first-year psychology building. Because all of her participants are university students, her sample can be considered representative of the entire university student body.

A researcher is planning several studies and needs to ensure their findings can generalize to their intended populations. Match each target population with the sample that would be most representative of it.

Analyze the following sampling scenarios for a research study investigating the average sleep quality of all students at a large university. Arrange these strategies in order from the highest degree of representativeness (1) to the lowest degree of representativeness (4) based on how well they mirror the target population.

You are designing a research study on dietary habits and need to create a representative sample of $200$ residents to ensure you can generalize your findings to a city where the population is $70$ meat-eaters and $30$ vegetarians. If you have already recruited $20$ meat-eaters, which of the following recruitment plans must you construct to complete a sample that mirrors the broader population in this respect?

Match each sampling concept with the statement that best describes its significance or role in psychology research.

A researcher attempting to generalize findings about 'consumer stress' to the entire national population recruits 5,000 participants exclusively from a single high-end luxury mall. To evaluate the validity of this study, a critic would argue that the researcher failed to obtain a(n) _____, as the participants' socioeconomic backgrounds do not mirror the diverse characteristics of the broader population in important respects.

A study sample that is similar to the broader population in important respects, allowing researchers to generalize their findings to that population, is known as a(n) _____ sample.

A researcher is studying the cognitive effects of aging. They analyze their sample and find that 90% of the participants hold a college degree, whereas census data shows only 30% of the broader elderly population has a degree. True or False: This sample can still be considered a representative sample because representativeness only requires similarity in age, and differences in education will not affect the ability to generalize findings to the broader population.

Evaluate the following research sampling procedures designed to study the average anxiety levels of all undergraduate students at a university. Order the procedures from the HIGHEST level of representativeness and generalizability (Rank 1) to the LOWEST level of representativeness and generalizability (Rank 3).