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How To Read Box Plots. A Note on Outliers The interquartile range IQR is the distance between the third quartile and the first quartile. This is the currently selected item. The interpretation of the compactness or spread of the data also applies to each of the 4 sections of the box plot. A distribution is considered Positively Skewed when mean median.
The shaded area on each set of dots contains the middle 50 of all the data. The interpretation of the compactness or spread of the data also applies to each of the 4 sections of the box plot. The upper edge hinge of the box indicates the 75th percentile of the data set and the lower hinge indicates the 25th percentile. On the graph the vertical line inside the yellow box represents the median value of the data set. How to Read a Box Plot A boxplot is a way to show a five number summary in a chart. A boxplot is a standardized way of displaying the distribution of data based on a five number summary minimum first quartile Q1 median third quartile Q3 and maximum.
This is the currently selected item.
If the box plot is relatively tall then the data is spread out. The box itself contains the middle 50 of the data. An ecologist surveys the age of about a hundred trees in a local forest he uses a box-and-whisker plot to map his data shown below what is the range of tree ages that he surveyed what is the median age of a tree in the forest so first of all lets just lets make sure we understand what this box and whisker plot is even about this is really a way of seeing the spread of all of the different data points which is the age. How to read a boxplot. The line inside the box represents the 50th quartile Q2 which defines the median of. A distribution is considered Positively Skewed when mean median.