11-1 and 11-2 Stats Questions and Sampling Methods

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What is a sample survey?

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A sample survey is a method of collecting data by asking a subset of individuals from a larger population about their opinions or behaviors.

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What is the difference between a parameter and a statistic?

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A parameter is a numerical value that summarizes a characteristic of a population, while a statistic is a numerical value that summarizes a characteristic of a sample.

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What is the purpose of random sampling?

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Random sampling aims to select individuals from a population in such a way that every individual has an equal chance of being chosen, reducing bias.

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What is cluster sampling?

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Cluster sampling is a sampling method where the population is divided into groups (clusters), and a random sample of these clusters is selected for the study.

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What is convenience sampling?

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Convenience sampling is a non-random sampling method where individuals are selected based on their easy availability and proximity to the researcher.

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What is observational study?

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An observational study is a research method where the researcher observes and records behavior without manipulating any variables.

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What is an experiment in statistics?

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An experiment is a study in which the researcher manipulates one or more variables to observe the effect on another variable.

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What is stratified sampling?

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Stratified sampling is a method where the population is divided into subgroups (strata) based on shared characteristics, and random samples are taken from each stratum.

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What is bias in sampling?

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Bias in sampling occurs when certain individuals or groups are systematically favored over others, leading to an inaccurate representation of the population.

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What is the population in a study?

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The population is the entire group of individuals or instances about whom we hope to learn.