Box and Whisker Plot Flashcard

A Box and Whisker Plot is a graphical representation of a dataset that shows its minimum, first quartile (Q1), median, third quartile (Q3), and maximum.

The lower quartile (Q1) represents the value below which 25% of the data falls.

The median is the middle value of a dataset, dividing it into two equal halves.

The upper quartile (Q3) represents the value below which 75% of the data falls.

The interquartile range (IQR) is the difference between the upper quartile (Q3) and the lower quartile (Q1), representing the middle 50% of the data.

To find the median, arrange the data in ascending order and locate the middle value.

The purpose of a Box and Whisker Plot is to visually summarize the distribution of a dataset and identify outliers.

The 'whisker' represents the range of the data outside the quartiles, extending to the minimum and maximum values.

Outliers can be identified as points that fall outside 1.5 times the IQR above Q3 or below Q1.

50% of the data lies between the lower quartile (Q1) and the upper quartile (Q3).