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Chapter 4: Designing Studies

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Across
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a ___ random sample consists of serrate simple random samples drawn from groups of similar individuals
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a "fake" treatment that is sometimes used in experiments
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the effort to minimize variability in the way experimental units are obtained and treated
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a process of drawing a conclusion about the population based on the same
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this kind the of study can not be used to establish cause-effect relationships
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the practice of using enough subjects in an experiment to reduce chance variation
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a study that systemically factors certain outcomes show this ___
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this occurs when some groups in a population are left out of the process of choosing a sample
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a study in which a treatment is imposed in order to observe a response
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the entire group of individuals about which we want information
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a simple ___ sample consists of individuals from the population, each of which has an equally likely chance of being chosen
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a ___ sample consists of a simple random sample of small groups from a population
Down
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groups of similar individuals in a population
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a group of experimental until that are similar in some way that may affect the response to the treatments
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the rule used to assign experimental units to treatments is ___ assignment
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smaller groups of individuals who mirror the population
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this occurs when an individual chosen for a sample can't be contacted or refuses to participate
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an observed effect that is too large to have occurred by chance alone
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a lack of ___ in an experiment can prevent us from generalizing the results
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a sample in which we choose individuals who are easiest to reach
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a ___ response sample consists of people who choose themselves by responding to a general appeal
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neither the subjects nor those measuring the response know which treatment a subject receives
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when units are humans, they are called ___
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the part of the population from which we actually collect information
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another name for treatments
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individuals on which an experiment is done is an experimental ___