Statistics Data Collection Flashcard

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What is replication in experimental design?

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Replication refers to the repetition of an experiment or study to increase the sample size and improve the reliability of the results.

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What are the key components of experimental design?

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The key components of experimental design include control group, experimental group, randomization, replication, and blocking.

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What are the various data collection techniques used in statistics?

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The various data collection techniques used in statistics include surveys, experiments, observational studies, and secondary data analysis.

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What is the role of randomization in data collection?

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Randomization ensures that every individual or item has an equal chance of being selected, which helps reduce selection bias.

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How does sample size affect data collection in statistics?

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A larger sample size increases the accuracy and reliability of the data collected.

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What is the purpose of a control group in an experiment?

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The control group serves as a baseline to compare the effects of the experimental treatment.

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Define observational study in statistics.

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An observational study is a type of research where the investigator observes subjects without manipulating any variables.

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What is the difference between qualitative and quantitative data?

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Qualitative data describes characteristics or qualities, while quantitative data involves numerical measurements.

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Explain the concept of bias in data collection.

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Bias refers to systematic errors that can affect the validity of data collection and analysis.

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What is a hypothesis in the context of experimental design?

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A hypothesis is a testable statement predicting the relationship between variables in an experiment.