What is inferential statistics or statistical inference?

Inferential statistics, also known as statistical inference, involves using data from a sample to make generalizations or predictions about a larger population. This branch of statistics enables researchers to draw conclusions beyond the immediate data set. For example, if a scientist conducts a survey on a small group of people to understand a health trend, inferential statistics allows them to extrapolate results to the entire population. Key concepts in inferential statistics include hypothesis testing, confidence intervals, and regression analysis, which all help in estimating population parameters and making decisions based on sample data.