Statistics: Population, Sample, Parameter, and Statistic-Casbar

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What is a population in statistics?

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A population is the entire group of individuals or items that we want to study or gather information about.

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What is a sample in statistics?

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A sample is a subset of the population selected for analysis, used to make inferences about the population.

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What is a parameter in statistics?

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A parameter is a numerical value that summarizes a characteristic of a population, such as the population mean or population proportion.

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What is a statistic in statistics?

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A statistic is a numerical value that summarizes a characteristic of a sample, such as the sample mean or sample proportion.

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What is the difference between a population and a sample?

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A population includes all members of a specified group, while a sample includes only a portion of that group.

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What does it mean to survey a population?

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To survey a population means to collect data from individuals in that population to gather insights or information.

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What is data in the context of statistics?

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Data refers to the facts or numbers collected through surveys or experiments that can be analyzed.

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What is a census?

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A census is a survey that attempts to collect data from every member of the population.

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What is sampling bias?

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Sampling bias occurs when the sample is not representative of the population, leading to inaccurate conclusions.

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What is random sampling?

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Random sampling is a technique where each member of the population has an equal chance of being selected for the sample.