Chapter 9 Review: Sampling, Experiments, Percentiles

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What is a Convenience Sample?

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A Convenience Sample is a type of non-probability sampling where the sample is taken from a group that is easy to reach. It is often used for quick and easy data collection but may not represent the entire population.

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What is a Simple Random Sample?

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A Simple Random Sample is a sampling method where every member of the population has an equal chance of being selected. This is often achieved by using random number generators or drawing names from a hat.

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What is an Unbiased Question?

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An Unbiased Question is a question that does not lead the respondent towards a particular answer. It is neutral and allows for a fair assessment of opinions.

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Why is Random Selection Important in Surveys?

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Random selection is important because it helps ensure that the sample represents the population accurately, reducing bias and increasing the validity of the results.

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What is a Voluntary Response Sample?

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A Voluntary Response Sample is a type of sampling where individuals choose to participate in the survey. This method can lead to bias as it often attracts those with strong opinions.

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What is a Systematic Random Sample?

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A Systematic Random Sample is a sampling method where you select every nth member from a list of the population. This method can introduce bias if there is a hidden pattern in the population.

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What is a Cluster Random Sample?

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A Cluster Random Sample is a sampling method where the population is divided into clusters (groups), and entire clusters are randomly selected. This is useful when populations are geographically spread out.

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What is a Misleading Graph?

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A Misleading Graph is a visual representation of data that distorts the truth, often through manipulation of scales, axes, or data presentation, leading to incorrect interpretations.

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What is the importance of Sample Size in Surveys?

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Sample size is crucial 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 the Tardy Policy?

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The Tardy Policy refers to the rules and regulations set by a school regarding students arriving late to class, which may include consequences or incentives for punctuality.