Sampling and Population Concepts

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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 draw conclusions 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.

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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 the difference between qualitative and quantitative data?

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Qualitative data describes characteristics or qualities, while quantitative data represents numerical values.

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What is a survey?

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A survey is a method of collecting data by asking questions to a group of people.

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What is response bias?

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Response bias is a tendency of respondents to answer questions inaccurately or falsely.

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What is the median in a data set?

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The median is the middle value when the data set is ordered from least to greatest.

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What is the mode in a data set?

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The mode is the value that appears most frequently in a data set.

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What is a random sample?

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A random sample is a sample that is selected from the population in such a way that every individual has an equal chance of being chosen.

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What is a stratified sample?

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A stratified sample is a sample that is divided into subgroups (strata) and random samples are taken from each stratum.