Concept Map
observational studies and experiments
Sampling and surveys
bias
good sampling techniques
non-sampling error
designed survey
Sampling error
Vocabulary of experiments: Experimental units (subjects), factors, treatments, and response variables.
explain three principles of experiment
define lurking variable's affect
define placebo, blinding
differences between studies and experiments
examples for above
voluntary response sampling
undercoverage
convenience sampling
wording bias
non-response
response bias
Placebo is a fake testing condition like giving someone sugar pills.It gives the allusion of something being done which can cause its own effect.
sampling made from people who are easy to sample
people who actively choose to respond to the survey
missing a significant portion of a population
This is a set of questions that will disproportionately be one answer because of a unfair line of questions or survey.
Failure to obtain a measurement on one or more study variables
The tendency of a person to answer questions on a survey untruthfully or misleadingly
Cluster- The researcher divides the population in separate groups
SRS- sampling technique with a equal chance of anyone being selected for testing
Stratified SRS- sampler divides the population into groups called strata that should be representitive of the population
Prejudice in favor in or against one thing, person, or group compared with another
replication,randomization,control
Blinding is - when the people performing the experiment dont know who is being tested and who is under the placebo effect
The lurking variable
A well-designed experiment includes design features that allows researchers the eliminate extraneous variables
If you were taking a sample of people at a sports even and you pick the section closest to you.
Talking about a topic such as political opinions.
Answering which ethnicity group is the best.
usually a problem with mail surveys
Saying that drugs are bad but also that they can cure cancer.
Picking random people out of a large crowd
Groups are made out of one larger group, and the smaller groups are knows as cluster groups
subgroups are made from a larger group but the subgroups all have something in common.
Who is better boys or girls?
Gathering data from a group to answer a question
double blinding is when the person being tested and the person testing them dont know who is being tested in the example
the lurking variable would be something that affects the outcome of the experiment and is not controlled
the new york pain test where the more expensive test drug had the patients thinking they were feeling pain.
When the study is something uncontrolled is observed and experiments have controlled variables
randomization- is the data being randomly selected
control- is the baseline for the testing
replication- is being able to reproduce test results