Translate:
English
Chinese (S)
Chinese (T)
Croatian
Dutch
French
German
Hebrew
Italian
Japanese
Korean
Portuguese
Russian
Serbian
Spanish
Swedish
Turkish
Additional
Observational study
English Wikipedia - The Free Encyclopedia
Download this dictionary
Observational study
In fields such as
epidemiology
,
social sciences
,
psychology
and
statistics
, an
observational study
draws inferences from a
sample
to a
population
where the
independent variable
is not under the
control
of the researcher. One common observational study is about the possible effect of a treatment on subjects, where the assignment of subjects into a treated group versus a
control group
is outside the control of the investigator. This is in contrast with
experiments
, such as
randomized controlled trials
, where each subject is
randomly assigned
to a treated group or a control group.
See more at Wikipedia.org...
© This article uses material from
Wikipedia
®
and is licensed under the
GNU Free Documentation License
and under the
Creative Commons Attribution-ShareAlike License