AP Stats: Experimental and Sampling Design

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What are the two essential features of all statistically designed experiments?

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Compare several treatments and use chance to assign subjects to treatments.

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CCSS.HSS.IC.B.3

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What is response bias in surveys?

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Response bias occurs when the responses given by participants are influenced by the way questions are asked or by the participants' characteristics.

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CCSS.HSS.IC.B.3

Front

What are the important factors in designing an experiment?

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I. Control of all variables that might influence the response variable. II. Randomization of subjects to treatment groups.

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CCSS.HSS.IC.B.3

Front

What type of sample is obtained when a random sample of schools is selected and every student in those schools is surveyed?

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Cluster sample.

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CCSS.HSS.IC.B.3

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What is the role of control groups in experiments?

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Control groups help to isolate the effect of the treatment by providing a baseline for comparison.

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CCSS.HSS.IC.B.3

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What is randomization in the context of experimental design?

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Randomization is the process of randomly assigning subjects to different treatment groups to eliminate bias.

Tags

CCSS.HSS.IC.B.3

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What is a placebo group?

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A placebo group is a group of subjects that receives a placebo treatment, which is an inactive substance, to compare against the treatment group.

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CCSS.HSS.IC.B.3

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What is the difference between observational studies and experiments?

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Observational studies observe subjects without manipulation, while experiments involve the manipulation of variables to determine cause and effect.

Tags

CCSS.HSS.IC.B.3

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What is a simple random sample (SRS)?

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A simple random sample is a sampling method where every individual has an equal chance of being selected.

Tags

CCSS.HSS.IC.B.3

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What is a stratified sample?

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A stratified sample is obtained by dividing the population into subgroups and randomly sampling from each subgroup.

Tags

CCSS.HSS.IC.B.3