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By Manuel Jimenez Perez
Across
This is a treatment that has no active ingredient, but is otherwise like other treatments.
This observes individuals and measures variables of interest, but does not attempt to influence the responses.
This involves using a chance process to determine which members of a population are included in the sample.
This occurs when an individual chosen for the sample can't be contacted or refuses to participate.
The _____ in a statistical study is the entire group of individuals we want information about.
These are the smallest collection of individuals to which treatments are randomly assigned. Card 16 of 27 PREVIOUS NEXT
When an observed difference in responses between the groups in an experiment is too large to be explained by chance variation in the random assignment, we say that the result is this.
In a _____ experiment, neither the subjects nor those who interact with them and measure the response variable know which treatment a subject received.
This is a subset of individuals in the population from which we collect data.
In a _____ experiment, either the subjects don't know which treatment they are receiving or the people who interact with them and measure the response variable don't know which subjects are receiving which treatment.
The ______ of an estimate describes how far, at most, we expect the estimate to vary from the true population value.
This occurs when two variables are associated in such a way that their effects on a response variable cannot be distinguished from each other.
Down
The design of a statistical study shows this if it would consistently underestimate or consistently overestimate the value you want to know when the study is repeated many times.
This consists of people who choose to be in the sample by responding to a general invitation. _____s are sometimes called self-selected samples.
A ______ is a specific condition applied to the individuals in an experiment.
In an experiment, this means that experimental units are assigned to treatments using a chance process.
A _____ of size n is a sample chosen in such a way that every group of n individuals in the population has an equal chance of being selected as the sample.
This occurs when some members of the population are less likely to be chosen or cannot be chosen for the sample.
When the units are human beings, they often are called _____.
This deliberately imposes some treatment on individuals to measure their responses.