Tools to re-arrange and edit data


Tools to help with one-variable numerical summaries

Sort the data (smallest to largest)

One-variable summary statistics

Understanding the standard deviation:

See the standard deviation numerically

Estimate the standard deviation from a graph




One-variable graphics toolkit:


Explore these types of graphs:

See examples of various types of graphs of one-variable numerical values. Various choices are provided. Experiment with some of them. See instructions for how to experiment at the end of this page.

How different can different samples from the same distribution look?


To start each of the four types of graphs: individual data plots, dotplots, stem-and-leaf plots, and histograms,

  • Click on "Random Values" and choose 25.
  • Then you'll see various options for the graph. Just use what is originally selected.

After you see how each works, then start experimenting with changing the settings for the graph without changing the values.

When you are ready, enter data values you have, if you wish.

  • Delete everything from the textbox with the values,
  • "Copy and paste" your data values into the box.

Caution: Not all graphs produced here are "good" graphs. Some have too few "bins" and some have too many "bins." One of the purposes of this website is to enable you explore various choices and develop an "eye" for how to produce useful graphs for a given set of data.



Relationships between variables

Exponential relationships

Two-way tables





Questions: Contact: Mary Parker