5.7 Types of Statistical Studies

Front

What is an experimental study?

Back

An experimental study is a research method where the researcher manipulates one variable and observes the effect on another variable, often involving random assignment to groups.

Front

What is a sample survey?

Back

A sample survey is a research method where a subset of a population is selected to represent the whole, allowing researchers to gather data about the population's characteristics.

Front

What is an observational study?

Back

An observational study is a research method where the researcher observes subjects in their natural environment without manipulation or intervention.

Front

What does biased sample mean?

Back

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

Front

What is a census in research?

Back

A census is a research method that involves collecting data from every member of the population.

Front

What is the purpose of random assignment in experiments?

Back

Random assignment helps ensure that each participant has an equal chance of being placed in any group, reducing bias and increasing the validity of the results.

Front

How does an observational study differ from an experimental study?

Back

An observational study involves watching subjects without intervention, while an experimental study involves manipulating variables to observe effects.

Front

What is the significance of control groups in experiments?

Back

Control groups serve as a baseline to compare the effects of the experimental treatment, helping to isolate the impact of the independent variable.

Front

What is the role of hypothesis in experimental research?

Back

A hypothesis is a testable prediction about the relationship between variables, guiding the research design and analysis.

Front

What is correlation in research?

Back

Correlation is a statistical measure that describes the extent to which two variables change together, but it does not imply causation.