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Collecting Data

Horizontales
An experiment when neither the subjects nor researchers know who is receiving treatment
A _____ sample consists of individuals who choose to participate
Smallest collection of individuals in an experiment
Condition applied to individuals in experiment
A ________ study cannot determine cause and effect
The observed difference in treatments is highly unlikely to occur by chance
Entire Group of Individuals
A consistent pattern of inaccurate responses
Obtaining data from all individuals
Some individuals cannot be reached or won't participate
Some members of population can't be sampled or are less likely to be
A treatment that has no active ingredient, but appears to.
The fact that subjects will respond to inactive treatment as if it were real
Verticales
Every individual has an equal chance of being selected for study
_____ sampling involves a change process to determine selection
A study which imposes some treatment on the individuals
Subjects are assigned to treatments by chance in an experiment
When you can't tell which of two variables is causing a change in response variable
A _____ sample is the easiest to reach
How far, at most, we expect estimate to vary from the true value
Used to provide a baseline in an experiment. May be given inactive treatment or no treatment
What we call humans when we experiment on them
Subset of individuals from which we collect data