Variables
The variable that the experimenter changes and or manipulates
Independent variable (definition)
What kind of study is taking place when researchers introduce an intervention and study the effects?
Experimental studies
(definition)
A researcher wishes to know more about the study habits of UMN students. They take a sample of students in order to complete the study. The entire UMN student body is what in this scenario?
The population
A study where each member of a subset has an equal probability of being chosen
Simple Random Sample
(definition)
An experiment that looked at the hypothesis that taking antibiotics twice a day for 2 weeks would build up antibodies that defend against the covid 19 virus was proven true. The data did not correlate with the results and the experimental design seemed flawed. This study was not published in a journal and not accessible to the public. This study represents key features of what?
Pseudoscience
In a study where one wants to test how the relationship between the amount of sleep students get and their test grades, is the sleep or the test score the dependent variable?
The Test Score
What kind of study is a nonexperimental research in which the researcher measures two variables and assesses the statistical relationship?
Correlational Studies
(definition)
The taller a person is, the heavier they seem to be. What is this an example of?
Correlation
The specific group that you will collect data from. The goal is to use the ___ to represent some larger population.
Sample
(definition)
In an experiment that looked at protein intake vs muscle growth the hypothesis that eating 4g/kg of protein per day would increase your muscle mass by 5% was proven falsifiable. This was backed up by multiple trials of experimental data. This study was then published in the journal of athletic medicine which is available for public use.This study represents key features of what?
Science
This type of variable influences both the dependent and independent variables
Confounding Variable
(definition)
What kind of study aims to evaluate interventions but doesn't use randomization?
Quasi experimental Designs
(definition)
More people are sunburned when the UV index is higher. In this case, the UV index is an example of what?
Causation
If a researcher wanted to examine the study habits of UMN students across different majors, they would likely divide the students into groups by major before randomly selecting test subjects from each group. This is an example of which method of sampling?
Stratified random sampling