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Relationship Between Sample and Population
In research, the sample is studied with the goal of generalizing the results to the broader population from which the sample was drawn. This process allows researchers to make inferences about a large group based on data collected from a smaller, representative subset. The relationship is visually comparable to extracting a small representative group from a vast crowd.
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Ch.2 Psychological Research - Psychology @ OpenStax
Introduction to Psychology @ OpenStax Course
OpenStax Psychology (2nd ed.) Textbook
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Relationship Between Sample and Population
A team of educational psychologists wants to investigate the effectiveness of a new mathematics curriculum for all fourth-grade students in a particular country. To do this, they plan to implement the curriculum in 200 classrooms across various regions and measure the students' learning outcomes. In this research scenario, what is the population?
Random Sample
Inferential Statistics
Sampling Frame
Limited Generalizability of Clinical/Case Studies
Relationship Between Sample and Population
Advantage of Surveys: Efficient Data Collection
A researcher studies the dietary habits of 200 professional marathon runners and finds that their average daily caloric intake is 3,500 calories. The researcher then concludes that the average adult consumes around 3,500 calories per day. Which statement best analyzes the primary weakness of this conclusion?
Strengths of Naturalistic Observation
Relationship Between Sample and Population
A team of researchers wants to understand the typical sleep habits of all adults in a country of 50 million people. Since they cannot survey every individual, which of the following approaches would be the most practical and scientifically sound first step for their investigation?
Random Sample
Example of a Sample: Talkativeness Study
Representative Sample
Inferential Statistics
Probability Sampling
Non-probability Sampling
Determinants of Survey Sample Size
Convenience Sampling
Survey Non-responder
Simple Random Sampling
Sampling Bias
Measures of Central Tendency
To conduct a study, researchers typically select a smaller subset of individuals from a broader group of interest. This smaller subset is referred to as a ____.
Learn After
Increasing Generalizability of the Sample
Example of Defining a Population and Sample for Research
A team of researchers wants to determine the average screen time of all high school students in a large country. They conduct a detailed survey with 1,000 students from a single, affluent suburban high school known for its technology-rich classrooms. What is the most significant methodological challenge the researchers face when trying to draw a conclusion about the entire country's high school student population from their data?
Sampling Bias