Proportionate Stratified Random Sampling

Disproportionate Stratified Random Sampling

Which of the following accurately describes the process of stratified random sampling?

A psychology researcher wants to study campus stress levels and decides to use stratified random sampling based on students' year of study (First-year through Fourth-year). Match each component of this specific study to the corresponding concept in stratified sampling.

A developmental psychologist is conducting a study on the social media habits of teenagers in a large school district. To ensure the results represent all grade levels equally, the researcher decides to use stratified random sampling based on grade (9th, 10th, 11th, and 12th). Arrange the following steps in the correct order to implement this sampling method.

A clinical psychologist studying depression stratifies a population by the severity of symptoms (Mild, Moderate, and Severe) and randomly selects 50 participants from each group, even though the 'Severe' group is much smaller in the general population. True or False: This approach is a valid application of stratified random sampling intended to ensure that the rarest subgroup has enough data for a reliable statistical analysis.

In stratified random sampling, after the population is divided into distinct subgroups (strata), the researcher draws a simple random sample independently from each subgroup.

Which of the following best explains the primary benefit of dividing a population into distinct subgroups (strata) before drawing independent simple random samples from each subgroup?

When a researcher determines that the most effective way to ensure that all segments of a population are represented in their study is to sample from distinct subgroups independently, they are making a judgment that _____ is the most appropriate method to use.

An educational psychologist wants to study reading comprehension among elementary students in a district. To guarantee that students from low, middle, and high socioeconomic statuses are adequately represented, the researcher separates the district's student roster into these three socioeconomic categories. Then, a random number generator is used to select 50 students from each category. This researcher has designed their study using ____ random sampling.

A cognitive psychologist wants to study memory retention across different age groups. They divide their target population into three strata: Young Adults, Middle-Aged Adults, and Older Adults. They then post a survey link on a popular social media platform and wait until exactly 100 people from each age group have voluntarily completed it. Which of the following represents an accurate methodological analysis of this study's sampling design?

A developmental psychologist is investigating a new reading intervention in a school district where 85 percent of students are neurotypical and 15 percent are neurodivergent. To ensure sufficient data for comparing both groups, the researcher separates the district roster into 'neurotypical' and 'neurodivergent' subgroups. The researcher then stands outside the special education resource room to hand out surveys to the first 50 neurodivergent students who walk by, and does the same outside the main cafeteria to recruit 50 neurotypical students.

How should a peer review committee evaluate this methodology's adherence to stratified random sampling?