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MAT 113: EXAM 2
Margin of Error
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Is added to and subtracted from the sample statistic to give an interval that the population parameter is likely to be within.
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Placebo |
Fake treatment that resembles the true treatment
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Statistics |
The science of collecting, organizing, and interpreting data (main purpose is to help us make devisions about issues that involve uncertainty.)
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Sample Statistic
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Percentage (or avg) that is true of the sample.
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Population Parameter
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Percentage (or avg) that is true of the population.
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Bias |
Occurs when study's design or conduct tends to favor certain results.
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Experiment
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Researchers apply some treatment and observe its effects on the subjects.
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Meta-analysis
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Previous studies are analyzed in order to find trends that were not evident in individual studies.
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Confounding |
Occurs when other factors other than the treatment could account for results of the study.
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Single-blind experiment
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Subjects are unaware of who is getting the true treatment, but researchers know.
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Double-blind experiment
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Neither subjects nor the researchers (that are working directly with the subjects) know who is getting the true treatment.
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Voluntary Response Survey
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A type of convenience sampling where the participants choose to be the sample.
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Observational Study
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Researchers watch and measure characteristics of subjects without imposing any change or treatment.
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Case-control Study
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Subjects have imposed a treatment upon themselves and researchers observe the effects of this self-imposed treatment.
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Population |
Complete group people or things being studied (Goal of study is to know specific characteristics of this group.)
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Sample |
Group of people or things from which the actual information is obtained.
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Placebo Effect
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Patients improve simply because they believe they are receiving a useful treatment.
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Control Group
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Subjects getting the fake treatment (or no treatment)
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Experimenter Effect
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Researcher somehow influences subjects through facial expressions, tone of voice, or attitude.
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Standard Deviation
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set of numbers actually measures the distance from each number to the man and then kind of averages those distances to find, roughly, the average distance each value is from the mean.
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