15
Apr
Negatively Skewed Box Plot. A positive skew is characterized by many small values and a few extremely large ones. When the median is in the middle of the box and the whiskers are roughly equal on each side the distribution is symmetrical or no skew. In a box plot the measure of average used is the median. Instead plot them individually labelling them as outliers.
Instead plot them individually labelling them as outliers. The Box Plot sometimes also called box and whiskers plot combines the minimum and maximum values ie. The box-and-whisker plot also known simply as the box plot is useful in visualizing skewness or lack thereof in data. This is represented by the vertical line inside the box. The formulas used for calculating and plotting for the negatively skewed box plot is the same as that of the positively skewed distribution. If the box plot is symmetric it means that our data follows a normal distribution.
If our box plot is not symmetric it shows that our data is skewed.
For a distribution that is negatively skewed the box plot will show the median closer to the upper or top quartile. Left or negatively skewed distribution box_plotshapes left Examples from real data sets. When the median is in the middle of the box and the whiskers are roughly equal on each side the distribution is symmetrical or no skew. The median is shown by the horizontal line drawn through the box. When the median is closer to the upper quartile Q3 and the whisker is shorter on the upper end of the box then the distribution is negatively skewed. The usual form of the box plot shown in the graphic shows the 25 and 75 quartiles and at the bottom and top of the box respectively.