# What is a double box and whisker plot?

## What is a double box and whisker plot?

Double box-and-whisker plots give you a quick visual comparison of 2 sets of data, as was also found with other double graph forms covered in previous sections .

### How do you read a box and whisker plot?

When the median is in the middle of the box, and the whiskers are about the same on both sides of the box, then the distribution is symmetric. When the median is closer to the bottom of the box, and if the whisker is shorter on the lower end of the box, then the distribution is positively skewed (skewed right).

What do the whiskers tell you about two data sets?

The whiskers: The lines coming out from each box extend from the maximum to the minimum values of each set. Together with the box, the whiskers show how big a range there is between those two extremes. Larger ranges indicate wider distribution, that is, more scattered data.

What are whiskers in box plot?

A Box and Whisker Plot (or Box Plot) is a convenient way of visually displaying the data distribution through their quartiles. The lines extending parallel from the boxes are known as the “whiskers”, which are used to indicate variability outside the upper and lower quartiles.

## What is a box plot and when to use it?

Introduction to box plots. A Box and Whisker Plot (or Box Plot) is a convenient way of visually displaying the data distribution through their quartiles.

• Types of box plots. Box plot represents a numeric vector of data that is split in several groups.
• Notched box plots.
• Complications in box plots.
• ### How to make a boxplot in R?

Create Box Plot. Before you start to create your first boxplot () in R, you need to manipulate the data as follow: Step 1: Import the data. Step 2: Drop unnecessary variables. Step 3: Convert Month in factor level. Step 4: Create a new categorical variable dividing the month with three level: begin, middle and end.

How do you create a box plot?

How do you plot a box plot? Step 1: Calculate the quartile values. First you need to calculate the minimum, maximum and median values, as well as the first and third quartiles, from the data set. …. Step 2: Calculate quartile differences. …. Step 3: Create a stacked column chart. ….

How do you calculate a box plot?

How do you calculate a Boxplot? Plot a symbol at the median and draw a box between the lower and upper quartiles.Calculate the interquartile range (the difference between the upper and lower quartile) and call it IQ. The line from the lower quartile to the minimum is now drawn from the lower quartile to the smallest point that is greater than L1.