11/21 Types of Statistical Studies

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What is an experimental study?

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An experimental study is a research method where the researcher manipulates one or more variables to determine their effect on a dependent variable, often involving random assignment to groups.

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What is an observational study?

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An observational study is a research method where the researcher observes and records behavior without manipulating any variables, allowing for the study of natural behavior.

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What is a sample survey?

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A sample survey is a research method that involves collecting data from a subset of a population to make inferences about the entire population.

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What is a census in research?

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A census is a research method that involves collecting data from every member of a population, providing complete information.

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What is the difference between an experiment and an observational study?

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An experiment involves manipulation of variables and random assignment, while an observational study involves observing behavior without manipulation.

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What is random assignment in experimental research?

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Random assignment is the process of assigning participants to different groups in a study randomly, ensuring that each participant has an equal chance of being placed in any group.

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

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A control group is used as a baseline to compare the effects of the experimental treatment, helping to isolate the effect of the independent variable.

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What is a biased sample?

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

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What is the significance of minimizing interaction in observational studies?

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Minimizing interaction helps to reduce the influence of the researcher on the subjects, allowing for more natural behavior to be observed.

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What is the role of variables in experimental research?

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Variables are elements that can change or be manipulated in a study; independent variables are manipulated, while dependent variables are measured.