They are used to indicate variability out of the upper and lower quartiles. Whiskers – These are the lines that extend from the boxes.Interquartile range – it ranges from the 25th to the 75th percentile.Third quartile – It is the middle value between the median and the highest value of the dataset.First quartile – It is the middle number between the smallest number and the median of the dataset.
Median – The middle value of the dataset.Some important terms relevant for obtaining these five numbers are – In other words, Box and Whisker Plots are 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”). These five numbers are median, upper and lower quartile, minimum and maximum data values which are also known as extremes. The box and whisker plot, which is also known as simply the box plot, is a type of graph that helps visualize the five-number summary. Now that we have recalled what is meant by median and quartile, let us learn what we mean by box and whisker plots. A particular quartile is a border between two neighbouring quarters of the distribution. Quartiles – A Quartile is a percentile measure that divides the total of 100% into four equal parts: 25%,50%,75% and 100%. If n is odd, then use the following formula –
Median – The median of a group of observations is the value of the variable which divides the group of n numbers into two equal parts. Now before we move further and learn more about the box and whisker plots, we must first recall some important terms that are relevant to the understanding of the box and whisker plots. Tukey also considered an additional variation in which the outliers are indicated separately and whiskers are dashed, ending with dashed crossbars at “adjacent values”. He used extended the whiskers all the way to the extreme data points and drew an unfilled dot at the maximum along with a hatched horizontal strip at the minimum. For instance, Tukey’s original formulation did not have horizontal crossbars. However, the arrangement of the box and whisker that is in use today slightly varies from what was proposed by J Turkey.
0 kommentar(er)
