Zusammenfassung der Ressource
Frage 1
Frage
What are the characteristics of an observational study?
Antworten
-
Investigators observe subjects
-
Investigators measure variables of interest
-
Investigators control variables of interest
Frage 2
Frage
Descriptive Statistics...
Antworten
-
Consists of methods for organizing and summarizing information.
-
Consists of methods for drawing and measuring the reliability of conclusions about a population based on information obtained from a sample of a population.
-
Includes the calculation of various descriptive measures such as averages, measures of variation, and percentiles.
-
Appeared after Inferential Statistics, historically.
-
Is interrelated with Inferential Statistics
-
Appeared before Inferential Statistics, historically.
-
Includes the construction of graphs, charts
Frage 3
Frage 4
Frage
A confounding variable is related both to
group membership and to the outcome of
interest. Its presence makes it hard to
establish the outcome as being a direct
consequence of group membership.