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22 Cards in this Set
- Front
- Back
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Observational Study
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Someone observes and measures the characteristics of a part of population
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Experiment
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Treatment is applied to part of a population and the response is observed
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Simulation
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Use a model to reproduce the conditions of a situation or process
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Survey
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an investigation of one or more characteristics of a population
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Confounding Variable
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happens when an experiment cannot tell the difference between the effects of different factors on a variable
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Placebo Effect
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a subject reacts favorably to a placebo when in fact he or she has been given no medical treatment
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Blinding
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when the subject does not know that he or she was given the placebo
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double Blind
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when neither the subject or the producer knows if the subject was given the placebo
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Randomization
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a process of randomly assigning subjects to different treatment groups
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Randomized Block design
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different randomized treatment blocks
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matched-pairs design
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subjects are paired accordingly to similarities. one receives one treatment and one receives a different one
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Replication
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the repetition of an experiment using a large group of subjects
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Census
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count or measure of an entire population
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Sampling Error
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the difference between the point estimate and the actual parameter value
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Random Sampling
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have an equal chance of being selected randomly
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Simple Random Sampling
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every possible sample of the same size has the same chance of being selected
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Stratified Sample
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divide a population into groups (strata) and select a random sample from each group
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Cluster Sample
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divide the population into groups (clusters) and select all of the members in on or more, but not all of the clusters
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Systematic Sample
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choose a starting value at random, the choose every Kth member of the population
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Convenience Sample
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consist only of available members of the population
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Qualitative Data
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consist of attributes, labels, and numerical entries
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Quantitative Data
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consist of numerical measurements or counts
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