Boxplots

Front

What is a boxplot?

Back

A boxplot is a graphical representation of a dataset that displays its minimum, first quartile (Q1), median, third quartile (Q3), and maximum values.

Front

What does the median represent in a boxplot?

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 boxplot?

Back

Quartiles are values that divide a dataset into four equal parts. The first quartile (Q1) is the median of the lower half, the second quartile (Q2) is the median, and the third quartile (Q3) is the median of the upper half.

Front

How do you find the interquartile range (IQR)?

Back

The interquartile range (IQR) is calculated by subtracting the first quartile (Q1) from the third quartile (Q3): IQR = Q3 - Q1.

Front

What does the lower quartile (Q1) indicate?

Back

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

Front

What does the upper quartile (Q3) indicate?

Back

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

Front

What is the range of a dataset?

Back

The range is the difference between the maximum and minimum values in a dataset.

Front

How can you identify outliers using a boxplot?

Back

Outliers can be identified as points that fall below Q1 - 1.5*IQR or above Q3 + 1.5*IQR.

Front

What is the significance of the whiskers in a boxplot?

Back

The whiskers in a boxplot extend from the quartiles to the minimum and maximum values, showing the spread of the data.

Front

What does a boxplot tell you about data distribution?

Back

A boxplot provides a visual summary of the central tendency, variability, and skewness of the data distribution.