Boxplots practice

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 dataset?

Back

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

Front

How do you find the lower quartile (Q1)?

Back

The lower quartile (Q1) is the median of the lower half of the dataset, excluding the overall median if the number of data points is odd.

Front

What is the upper quartile (Q3)?

Back

The upper quartile (Q3) is the median of the upper half of the dataset, excluding the overall median if the number of data points is odd.

Front

What is the interquartile range (IQR)?

Back

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

Front

How do you calculate the range of a dataset?

Back

The range is calculated by subtracting the minimum value from the maximum value in the dataset.

Front

What does it mean if a data point is considered an outlier?

Back

An outlier is a data point that is significantly higher or lower than the other values in the dataset, often identified as being more than 1.5 times the IQR above Q3 or below Q1.

Front

What percentage of data lies within the interquartile range (IQR)?

Back

Approximately 50% of the data lies within the interquartile range (IQR).

Front

How do you interpret a boxplot?

Back

A boxplot shows the distribution of data based on a five-number summary: minimum, Q1, median, Q3, and maximum. It helps identify the center, spread, and potential outliers.

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, indicating the range of the data excluding outliers.