Comparing box plots

Front

What is a box plot?

Back

A box plot is a graphical representation of a data set that shows its minimum, first quartile, median, third quartile, and maximum.

Front

What does the range of a data set represent?

Back

The range represents the difference between the highest and lowest values in a data set.

Front

How do you calculate the interquartile range (IQR)?

Back

The IQR is calculated by subtracting the first quartile (Q1) from the third quartile (Q3).

Front

What is the median of a data set?

Back

The median is the middle value when the data set is ordered from least to greatest.

Front

What do you do if there are two middle numbers when finding the median?

Back

Add the two middle numbers and divide by two.

Front

What does a wider box in a box plot indicate?

Back

A wider box indicates a greater spread of the middle 50% of the data.

Front

What is the purpose of a box plot?

Back

A box plot is used to visually summarize the distribution of a data set and to identify outliers.

Front

What does the line inside the box of a box plot represent?

Back

The line inside the box represents the median of the data set.

Front

What is an outlier in a data set?

Back

An outlier is a value that is significantly higher or lower than the other values in the data set.

Front

How can you tell which data set has a greater spread using box plots?

Back

You can compare the lengths of the boxes and the whiskers; a longer box or whisker indicates a greater spread.