AP Stats Chapter 4

Define Treatment.

• Explanatory variables
• Conclusion
• Smallest Collection
• Experiment

In a completely randomized design...

• They provide a baseline for comparing the effects of the other treatments.
• They are a random assignment.
• A response to a dummy treatment.
• Treatments are assigned to all the experimental units.

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Systematic random sample is.

• is defined as the group in an experiment or study that does not receive treatment by the researchers and is then used as a benchmark to measure how the other tested subjects do.
• is a type of probability sampling method in which samplemembers from a larger population are selected according to a random starting point and a fixed periodic interval

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Control group is...

• of a new invention or product) based on untested ideas or techniques and not yet established or finalized.
• is defined as the group in an experiment or study that does not receive treatment by the researchers and is then used as a benchmark to measure how the other tested subjects do.

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Define Margin of Error.

• an amount (usually small) that is allowed for in case of miscalculation or change of circumstances.
• is the difference between a measurement and the true value or between two measured values.

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Name two of the inferences that can be identified based on the design of a study.

• well designed 
• lake of realism
• non sampling
• Observational 

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Does using chance to assign treatments in an experiment gaurantee a completelhy randomized design? 

• Yes because, you are going off randomly.
• No because the the chances are being randomly divided.

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Define Statistically significant.

• An observed effect so large that it would rarely occur by change.
• Group of experimental units that are known before the experiment.

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What is Randomized block design?

• Randomized blocked experiment in which each block consists of a matching pair of similar experimental units.
• experimental units to treatments is carried out separately within each block. 

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Describe the Placebo effect.

• It can be misleading
• List if individuals
• A response to the dummy treatment.

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