Random Versus Biased Statistical Questioning

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What is a random sampling?

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A method of selecting a subset of individuals from a population where each individual has an equal chance of being chosen.

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What is biased sampling?

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A method of selecting individuals from a population that does not give every individual an equal chance of being chosen, leading to skewed results.

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Why is surveying only households that purchased a new TV biased?

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It does not represent the entire population of households, as it excludes those who did not buy a new TV.

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What is the definition of a statistical question?

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A question that anticipates variability in the data and can be answered by collecting data.

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What is an example of a random statistical question?

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What is the average height of students in a school?

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What is an example of a biased statistical question?

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What is the average height of students in a basketball team?

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How do you determine if a question is random or biased?

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Evaluate if the sampling method allows for equal representation of the population.

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What does it mean if a question is considered random?

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It means the question is likely to yield results that are representative of the entire population.

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What is the importance of random sampling in statistics?

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It helps ensure that the results of a survey or study can be generalized to the larger population.

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What is a systematic sampling method?

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A method where you select every nth individual from a list or sequence.