Box Plots (Reading, Interpreting)

Front

What is a box plot?

Back

A box plot, or box-and-whisker plot, is a graphical representation of a dataset that shows its minimum, first quartile (Q1), median, third quartile (Q3), and maximum.

Front

What does the median represent in a box plot?

Back

The median is the middle value of a dataset when it is ordered from least to greatest, dividing the dataset into two equal halves.

Front

What are quartiles in a box plot?

Back

Quartiles are values that divide a dataset into four equal parts. Q1 is the first quartile, Q2 is the median, and Q3 is the third quartile.

Front

What is the interquartile range (IQR)?

Back

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

Front

How do you calculate the IQR?

Back

IQR = Q3 - Q1.

Front

What does the lower quartile (Q1) represent?

Back

Q1 represents the value below which 25% of the data falls.

Front

What does the upper quartile (Q3) represent?

Back

Q3 represents the value below which 75% of the data falls.

Front

What is the purpose of the whiskers in a box plot?

Back

The whiskers extend from the box to the smallest and largest values within 1.5 times the IQR from the quartiles, showing the range of the data.

Front

What percent of data falls between Q1 and Q3?

Back

50% of the data falls between Q1 and Q3.

Front

What does a box plot indicate about data distribution?

Back

A box plot indicates the spread, center, and skewness of the data distribution.