The practice of working with data to extract meaningful information. This can include description, statistical model fitting, qualitative coding, and visualization to gain insights from that data. This includes practices such as descriptive statistics (e.g. finding means, medians, and counts of different groups), inferential statistics (e.g. finding correlations between variables to know that if as one value, such as height, increases, another value, such as weight, either increases, decreases or has no relation), qualitative description (e.g. coding interviews for themes), and using data visualization to detect patterns in data. Sometimes data collection and data cleaning are included in a more expansive definition of data analysis.