Surveys/Bias
Sampling bias when the sample is the easiest group to study
What is a convenience sample?
study that imposes a treatment on individuals to measure their responses
What is an experiment?
A group that doesn't receive the treatment and is compared with the group that does
What is a control group?
entire group of individuals we want to learn about in a study
What is population?
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Sampling bias when the people in the sample choose themselves for the survey by phoning in or entering an online poll.
What is Voluntary Sampling?
variable that measures an outcome of a study (the y-axis variable)
What is a response variable?
Positive response to a fake treatment
What is a placebo effect?
Sampling method that uses a chance process in selecting study participants
What is a random sample?
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Study that observes individuals and measures variables of interest but does not attempt to influence the responses
What is an observational study?
Variable that is controlled by the experimenter
What is an explanatory variable?
observed effect so large that it would rarely occur by chance
What is statistically significant?
The part of the population that we actually observe in a study
What is a sample?
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What are Rumi and Sir?
A judgement based on evidence--in stats, the evidence comes from a sample.
What is an inference?
when the effects of two variables on a response variable cannot be separated from each other
What is confounding?
making sure that non-explanatory variables are the same for each experimental unit
What is control?
Sampling method that randomly chooses one of several similar groups.
What is cluster sampling?
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What is Fenty?
When many individuals chosen for the study can't be contacted or refuse to respond
What is nonresponse bias?
a specific condition applied to the individuals in an experiment
What is a treatment?
having many experimental units in each treatment group
What is replication?
Sampling method that samples from many different groups of similar people.
What is stratified sampling?
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What is zero?