3A Vocab
In a statistical study is the entire group of individuals we want information about....
What is population
______ ______ ______gives every possible sample of a given size the same chance to be chosen.
What is simple random sample (SRS)
_______ _____used to provide a baseline for comparing the effects of other treatments.
What is control group
________the experimental units are human beings, they are often called
What are subjects
_____Collects data from every individual in the population.
What is census
_____divide the population into non-overlapping groups of individuals that are located near each other,
What is a cluster sample
_______ _______Describes the fact that some subjects in an experiment will respond favorably to any treatment, even an inactive treatment.
What is placebo effect
________is a specific condition applied to the individuals in an experiment.
What is treatment
______t involves using a chance process to determine which members of a population are chosen for the sample.
What is random sampling
______ ______ ______Divides the population into nonover-lapping groups of individuals that are similar in some way that might affect their responses.
What is Stratified Random Sampling
______ ______experiment, neither the subjects nor those who interact with them and measure the response variable know which treatment a subject is receiving.
_____ _______experiment, either the subjects or the people who interact with them and measure the response variable don’t know which treatment a subject is receiving.
What is double blind (experiment)
What is single blind (experiment)
______The different values of a factor
What is levels
_____ _______observes individuals and measures variables of interest, but does not attempt to influence the responses.
_____deliberately imposes treatments on experimental units to measure their responses.
What is observational study
What is experiment
________occurs when there is a consistent pattern of inaccurate responses to a survey question.
What is response bias
_______is an explanatory variable that is manipulated and may cause a change in the response variable.
What is factor
The object to which a treatment is randomly assigned...
What is experimental units
____Observational studies that examine existing data for a sample of individuals are
____Observational studies that track individuals into the future are
What is retrospective
What is prospective
Choose an SRS by labeling the members of the population and using slips of paper, a table of random digits, or technology to select the sample. Make sure to use__________ _________ ___________ when selecting SRS.
What is sampling without replacement
_________Occurs when two variables are associated in such a way that their effects on a response variable cannot be distinguished from each other.
What is confounding
______ _______may help explain or predict changes in a response variable
What is explanatory variable