A _____ is a treatment that has no active ingredient, but is otherwise like other treatments.
A(n) _____ study observes individuals and measures variables of interest but does not attempt to influence the responses.
Choosing individuals from the population who are easy to reach results in a(n) _____ sample.
A _____ random sample of size n is chosen in such a way that every group of n individuals in the population has an equal chance to be selected as the sample.
_____ occurs when some members of the population are less likely to be chosen or cannot be chosen in a sample.
_____ random sampling selects a sample by choosing an SRS from each stratum and combining the SRSs into one overall sample.
When the observed results of a study are too unusual to be explained by chance alone, the results are called _____.
The _____ in a statistical study is the entire group of individuals we want information about.
A(n) _____ is the object to which a treatment is randomly assigned. When the experimental units are human beings, they are often called subjects.
A(n) _____ is a subset of individuals in the population from which we actually collect data.
A specific condition applied to the individuals in an experiment is called a(n) _____.
_____ occurs when two variables are associated in such a way that their effects on a response variable cannot be distinguished from each other.
A(n) _____ deliberately imposes some treatment on individuals to measure their responses.
Verticales
_____ sampling allows people to choose to be in the sample by responding to a general invitation.
The _____ describes the fact that some subjects in an experiment will respond favorably to any treatment, even an inactive treatment.
_____ occurs when there is a systematic pattern of inaccurate answers to a survey question.
In a(n) _____ experiment, neither the subjects nor those who interact with them and measure the response variable know which treatment a subject received.
The design of a statistical study shows _____ if it is very likely to underestimate or very likely to overestimate the value you want to know.
_____ sampling selects a sample by randomly choosing clusters and including each member of the selected clusters in the sample.
In an experiment, a _____ is used to provide a baseline for comparing the effects of other treatments.
_____ occurs when an individual chosen for the sample can’t be contacted or refuses to participate.
_____ random sampling selects a sample from an ordered arrangement of the population by randomly selecting one of the first k individuals and choosing every kth individual thereafter.
A _____ collects data from every individual in the population.
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