Honors Stat - Unit 3A Graded Assignment

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What is a valid statistical question?

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A statistical question is one that anticipates variability in the data and can be answered by collecting data. For example, 'How many hours of sleep do students get per night?' is a valid statistical question.

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What is a simple random sample?

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A simple random sample is a sampling method where every individual has an equal chance of being selected. For example, drawing names from a hat.

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What is the purpose of random assignment in experiments?

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Random assignment helps ensure that each participant has an equal chance of being assigned to any group, which helps eliminate bias and allows for causal conclusions.

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Why is 'How tall is Mr. DeSiena?' not a valid statistical question?

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It is not a valid statistical question because it only has one answer and does not involve variability.

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What is undercoverage bias in surveys?

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Undercoverage bias occurs when some members of the population are inadequately represented in the sample. For example, surveying only students in the cafeteria excludes those who do not eat there.

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What is a convenience sample?

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A convenience sample is a sampling method where participants are selected based on their easy availability rather than random selection.

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What is response bias?

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Response bias occurs when participants provide inaccurate answers due to various factors, such as misunderstanding the question or social desirability.

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What is the difference between a population and a sample?

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A population is the entire group being studied, while a sample is a subset of the population selected for analysis.

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What is a biased sample?

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A biased sample is one that does not accurately represent the population, leading to skewed results.

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What is the importance of sample size in statistics?

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Larger sample sizes generally lead to more reliable and valid results, reducing the margin of error.