Random Samples

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What is a random sample?

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A random sample is a subset of individuals chosen from a larger population, where each individual has an equal chance of being selected.

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What is the population in a survey?

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The population is the entire group of individuals that a researcher is interested in studying.

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What is a sample size?

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The sample size is the number of individuals included in a sample.

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How do you calculate the number of individuals in a sample who have a certain characteristic?

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Multiply the total sample size by the proportion of individuals with that characteristic.

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What is the difference between a sample and a population?

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A sample is a smaller group selected from a population, which is the entire group of interest.

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Why is it important to have a representative sample?

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A representative sample accurately reflects the characteristics of the population, allowing for valid conclusions.

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What is bias in sampling?

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Bias occurs when certain individuals are more likely to be selected for the sample than others, leading to inaccurate results.

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What is a convenience sample?

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A convenience sample is a type of non-random sampling where individuals are selected based on their easy availability.

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What is stratified sampling?

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Stratified sampling involves dividing the population into subgroups and randomly selecting samples from each subgroup.

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What is the purpose of conducting a survey?

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The purpose of conducting a survey is to gather information and insights about a population's opinions, behaviors, or characteristics.