Visualizing Minnesota Education By Race and Gender

The Minnesota State Demographic center created an interesting contest around visualizing the educational attainments of the state.   So I thought that Dex might be useful in producing some visualizations with the data.

After looking at the data, I chose to dig into a visualization of the educational attainment of its citizens divided by Race and Sex.

The analysis produced a number of interesting visuals which I would like to share.

Sankey Diagram

By far, the most succinct and effective display of this information is the Sankey diagram.

Here is a static view of the diagram:

Each color coded group to the left represents 100 percent of that population based upon race and sex.  The connections are weighted by the percentage of that population group which has attained the education level represented in the color coded groups to the right.  Hovering over a connection will bring up a popup which displays the exact percentage of that population which has achieve the education level to which it is connected.

Hovering over the color code boxes gives the percentage of the population within that group.  It is a bit confusing, however, the boxes to the right can exceed 100% because they are comprised of some ratio of the12 groups of 100% represented to the left.  Still, it conveys an effective sense of proportion in a single chart rather than traditional pie bar charts which tend to overwhelm.

You can play with a live versions of Sankey diagrams here, each gives a different insight into the data:

When we plug population totals into the Sankey, we see a very different view of the data.

Image

Minnesota’s primary racial demographic is white.  Here is a live version of this visualization.

Dendogram

The dendogram is a fancy Greek word for Tree.  It’s a nice way to show a lot of data at once, but you have to imagine proportion.

 Image

Radial Cluster

This is another good view of overall data connectivity, if not proportion.  However, the Dex version of this view still needs some work for datasets containing this much data, as you can see below.

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Digging Into The Data

There are a number of other views which are nice for digging into hierarchical data.  They can also be used to convey proportion similar to Sankey, however, Dex is not currently supporting this feature yet.

Starburst

The first of these views is the Starburst, named for it’s sometimes overwhelming burst of colors.

Image

This Starburst consists of concentric circles consisting of Race, Sex, Education Level and Total Population starting inside working our way out.  A live version of this view can be found here.

PARTITION LAYOUT

The partition layout is also nice for quickly digging into a population segment of interest.

You can play around with this view here.

INDENTED TREE

The last of these types of views is the indented tree depicted below.

Image

This view isn’t useful for conveying a sense of proportion, however, it is good for quickly digging into key data.  You can see a live version of this view here.

Fun But Less Useful

Hive Plots

Hive plots are great for showing connectivity without the clutter.  However, Dex still needs to work out the bugs in this view, however, I include it here for fun anyhow.

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Force Diagrams

These are can be used to show interconnections and are just plain fun to play with.

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Traditional Representations

Traditional representations are still quite effective for telling the story.  The following pie charts give a pretty good picture.

Asian

Asian

The Asian community has a high percentage of people with higher education. However, there is also a large percentage of people without a high school diploma.

Black

Black

Slightly less than 25% of the Black community does not possess a High School diploma. While a high percentage of the Black community do go to college, a much smaller percentage actually acquires a degree.

Hispanic and Latino

Hispanic and Latino

The Hispanic and Latino community’s educational situation is the most dire in Minnesota. Almost 25% of the community has less than a 9th grade education. Around 40% does not possess a High School diploma. Less than 25% of this community goes on to achieve an Associate’s degree or beyond.

American Indian and Native Alaskan

American Indian and Native Alaskan

The American Indian and Native Alaskan community has a relatively high percentage of it’s population who do not possess a High School diploma. A relatively large percentage do achieve their High School diplomas through a GED program. Less than 25% of the community achieves an Associates degree or better.

White

White

A relatively small percentage of the White community does not possess a high school diploma. A large percentage of this community pursues higher education and over half of the members who do, achieve an Associates degree or better.

As you can see, visualizations such as the Sankey can display the same or even more information than a series of traditional Pie Charts very effectively and quite succinctly.

Thinking back on this effort, I am left with a couple of thoughts.  The Minnesota educational system seems to be working well for the general population.  This is something of which Minnesota should be proud.  However, it’s educational system is not working equally well across all demographics.

The population in Minnesota is dominated by Caucasians, more so than the national average.  Could this be a contributing factor in the fact that the educational system seems to be less effective for its minorities; especially Hispanics and Latinos?  Should adjustments be made to ensure greater success in the minority communities?  Would this do more harm than good given the relative effectiveness of the general educational system?  I don’t know, but hope that analysis such as these help smarter folks than myself make better decisions for the greater good.

To me, that is what the Dex project is all about.  Pay it forward.

– Pat

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About patmartin

I am a coder and Data Visualization/Machine Learning enthusiast.
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