But 10.2 is fully below the lower outer fence, so 10.2 would be an extreme value.
The elements required to construct a box and whisker plot outliers are given below. Creating box and whisker plots has never been so easy with Displayr's free online box and whisker plot maker. The horizontal line inside the box is the median. Therefore the vertical width of the central box represents the inter-quartile deviation. The bottom side of the box represents the first quartile, and the top side, the third quartile. In the box and whisker diagram, it has five pieces of information, (also called a five-number summary). The box plot is also referred to as box and whisker plot or box and whisker diagram. Since 16.4 is right on the upper outer fence, this would be considered to be only an outlier, not an extreme value. The box and whisker plot displays how the data is spread out. The box-and-whisker plots below show a class’ test scores for two tests. Looking again at the previous example, the outer fences would be at 14.4 – 3×0.5 = 12.9 and 14.9 + 3×0.5 = 16.4. The Box and Whisker Plot, or also known as Box-plot, is a type of graph that provides easy to see key features of the distribution of a sample. Create a box and whisker plot using this data: 77, 99, 112, 85, 117, 68, 63. Then the outliers will be the numbers that are between one and two steps from the hinges, and extreme value will be the numbers that are more than two steps from the hinges. To find the range of all plots, subtract the smallest value from the largest value. The meatmeal group has the widest range of weight and. The outliers (marked with asterisks or open dots) are between the inner and outer fences, and the extreme values (marked with whichever symbol you didn't use for the outliers) are outside the outer fences.īy the way, your book may refer to the value of " 1.5×IQR " as being a "step". whisker work making and understanding box and whisker plots five box whisker plot box and whisker wksh 1 box and whisker plots box and whisker plotsBox Plot Online Math Learning May 11th, 2018 - A Box Plot Also Called A Box And Whisker Plot Shows Data Using The Middle Value Of The Data And The Quartiles Or 25 Divisions Of The Data Drawing A. In its simplest form, the box and whisker diagram has a box showing the range from first to third quartiles, and the median divides this large box, the interquartile range, into two boxes, for the second and third quartiles. Boxplots (sometimes called box and whisker plots) are a fundamental type of statistical chart.
If your assignment is having you consider not only outliers but also "extreme values", then the values for Q 1 – 1.5×IQR and Q 3 + 1.5×IQR are the "inner" fences and the values for Q 1 – 3×IQR and Q 3 + 3×IQR are the "outer" fences. The values for Q 1 – 1.5×IQR and Q 3 + 1.5×IQR are the "fences" that mark off the "reasonable" values from the outlier values.