![]() Maximum: This is the highest value in the data set, excluding outliers, and is marked by the end of the upper whisker in the plot. It indicates that 75% of the data are less than or equal to Q3. Third Quartile (Q3): This is the upper quartile, representing the median of the upper half of the data set. The median divides the dataset into two equal halves and is a measure of central tendency. Median: This is the middle value when the data set is ordered from lowest to highest. This means that 25% of the data points in the dataset are less than or equal to Q1. In a box plot, it is typically represented by the end of the lower whisker.įirst Quartile (Q1): Also known as the lower quartile, it is the median of the lower half of the data set. Minimum: This is the lowest value in the data set, excluding any outliers. The plot is based on a five-number summary, which includes the following key points: This detailed explanation will delve into the intricacies of box plots, focusing particularly on their structure and the insights they offer.Īt its core, a box plot is a graphical representation of data that shows the distribution through their quartiles, highlighting the median, the spread, potential skewness, and outliers. ![]() Their design is elegantly simple yet packed with valuable information about a dataset’s distribution. Box plots, commonly referred to as box-and-whisker plots, are an essential tool in both statistics and data visualization.
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