statistics 1.2
What does it mean when an observational study is prospective?
A prospective study collects the data over time.
Which is the superior observational study?
Neither study is always the superior to the other. Both have advantages and disadvantages that depend on the situation
What is a confounding variable?
A confounding variable is an explanatory variable that was considered in a study whose effect cannot be distinguished from a second explanatory variable in the study.
What is a lurking variable?
A lurking variable is an explanatory variable that was not considered in a study, but that affects the value of the response variable in the study. In addition, lurking variables are typically related to explanatory variables in the study.
observational study is retrospective?
A retrospective study requires that individuals look back in time or require the researcher to look at existing records.
What is a case-control study?
Case-control studies are observational studies that are retrospective, meaning that they require individuals to look back in time or require the researcher to look at existing records.
Explain what is meant by confounding. What is a lurking variable? What is a confounding variable?
Confounding in a study occurs when the effects of two or more explanatory variables are not separated. Therefore, any relation that may exist between an explanatory variable and the response variable may be due to some other variable or variables not accounted for in the study.
What is a cross-sectional study?
Cross-sectional studies are observational studies that collect information about individuals at a specific point in time or over a very short period of time
athletes are randomly divided into two groups. One group trains using weight resistance the other trains using cardio. After 2 months, each group completes a fitness test to compare agility.
The study is an experiment because the researchers control one variable to determine the effect on the response variable
