Comparing Data: Box and Dot Plots

Front

What is a box plot?

Back

A box plot is a graphical representation of data that shows the distribution through five summary statistics: minimum, first quartile (Q1), median, third quartile (Q3), and maximum.

Front

What is a dot plot?

Back

A dot plot is a simple graphical display that uses dots to represent the frequency of data points in a dataset.

Front

How do you find the median of a data set?

Back

To find the median, arrange the data points in numerical order and identify the middle value. If there is an even number of data points, the median is the average of the two middle values.

Front

What does the median represent in a data set?

Back

The median represents the middle value of a data set, dividing it into two equal halves.

Front

What is the range of a data set?

Back

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

Front

How do you interpret the interquartile range (IQR)?

Back

The interquartile range (IQR) measures the spread of the middle 50% of the data, calculated as Q3 - Q1.

Front

What is the purpose of comparing medians?

Back

Comparing medians helps to understand the central tendency of different data sets, especially when they have outliers.

Front

What does a higher median indicate about a data set?

Back

A higher median indicates that the central value of the data set is greater, suggesting that the majority of the data points are higher.

Front

How can you determine the percentage of data above a certain value in a box plot?

Back

To determine the percentage of data above a certain value, identify the position of that value in relation to the quartiles and total data points.

Front

What does it mean if two data sets have the same median?

Back

If two data sets have the same median, it means that the central value is the same, but the overall distribution may still differ.