Sávgörbék

Sávgörbék, also known as band curves or streak curves, are a type of chart used in data visualization and analysis. They represent the distribution and spread of a continuous variable over a categorical variable or time. Typically, a sávgörbe displays a central line, often representing the median or mean, with shaded areas or bands extending outwards. These bands usually indicate different statistical measures of dispersion, such as interquartile ranges, standard deviations, or confidence intervals.

The primary purpose of a sávgörbe is to show not only the central tendency of data but also its variability. This allows viewers to quickly assess how consistent or spread out the data is within different categories or over time. For instance, in financial analysis, a sávgörbe might show the price of a stock over time, with the central line indicating the average price and the bands representing historical volatility. In scientific research, it could illustrate experimental results, highlighting the average outcome and the range of individual measurements.

Interpreting a sávgörbe involves observing the position of the central line and the width of the bands. A narrow band suggests low variability, meaning the data points are clustered closely around the central tendency. Conversely, a wide band indicates high variability, with data points spread over a larger range. Changes in the bands over time or across categories can reveal trends in dispersion, such as increasing or decreasing uncertainty. Sávgörbék are particularly useful for comparing distributions across different groups or for tracking changes in variability over periods.