2ND NINE WEEKS REVIEW

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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 set, where each individual has an equal chance of being selected. This method helps to ensure that the sample represents the population accurately.

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Why is it important to have an unbiased sample in surveys?

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An unbiased sample ensures that the results of a survey are valid and can be generalized to the larger population. It prevents skewed results that could misrepresent the views or behaviors of the entire group.

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What is the difference between a biased and an unbiased survey?

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A biased survey is one where the sample is not representative of the population, leading to skewed results. An unbiased survey uses random sampling methods to ensure every individual has an equal chance of being selected.

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What is stratified sampling?

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Stratified sampling is a method of sampling that involves dividing a population into subgroups (strata) and then taking a random sample from each stratum. This ensures representation from all segments of the population.

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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 or opinions from a group of people to understand their preferences, behaviors, or characteristics.

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What is a survey method that provides accurate results?

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A survey method that provides accurate results is one that includes a diverse and representative sample of the population, such as asking a balanced number of boys and girls from different classes.

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What does it mean to survey every fifth student?

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Surveying every fifth student means selecting every fifth individual in a sequence to participate in the survey, which is a method of systematic sampling.

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What is convenience sampling?

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Convenience sampling is a non-random sampling method where participants are selected based on their easy availability and proximity to the researcher, which can lead to biased results.

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What is the significance of sample size in surveys?

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The sample size is significant because a larger sample size generally leads to more reliable and valid results, reducing the margin of error and increasing the confidence in the findings.

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What is a population in the context of surveys?

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A population is the entire group of individuals or instances about whom we hope to learn through a survey.