Advanced Algebra C& C: Unit 1 Test

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What is a census?

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A census is a method of collecting data that involves gathering information from every member of a population.

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What is sampling in data collection?

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Sampling is the process of selecting a subset of individuals from a population to estimate characteristics of the whole population.

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What is simple random sampling?

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Simple random sampling is a sampling technique where each member of the population has an equal chance of being selected.

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What is stratified sampling?

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Stratified sampling is a sampling method that involves dividing the population into subgroups (strata) and taking a sample from each stratum.

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What is cluster sampling?

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Cluster sampling is a sampling technique where the population is divided into clusters, and entire clusters are randomly selected.

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What is an observational study?

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An observational study is a type of research where the researcher observes and measures characteristics without manipulating conditions.

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What is a natural experiment?

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A natural experiment is an observational study where the researcher observes the effects of naturally occurring events.

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What is a double-blind experiment?

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A double-blind experiment is a study design in which neither the participants nor the researchers know who is receiving the treatment or placebo.

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What is a placebo?

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A placebo is a treatment that has no therapeutic effect, often used as a control in experiments.

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What is the placebo effect?

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The placebo effect is a phenomenon where patients experience improvements in their condition simply because they believe they are receiving treatment.