See what Kentucky Youth Advocates Research Director, Amy Swann has to say about the 2020 Census
Kentucky Youth Advocates Research Director, Amy Swann on how the Census impacts our kids at school, how the Census can impact kids’ health, how you can be sure you’re speaking to a legitimate Census Bureau employee, and more. For more information on 2020 Census jobs, click here. Learn how you can spread the word here. […] Read More »
See what Metro United Way Director of Engagement, Mandy Simpson has to say about the 2020 Census
Metro United Way Director of Engagement Mandy Simpson discusses groups that are typically undercounted in the Census, how the Census impacts international communities, why it’s easier than ever to complete the Census, and more. For more information on 2020 Census jobs, click here. Learn how you can spread the word here. To view important dates […] Read More »
See what Kentucky State Representative, Attica Scott has to say about the 2020 Census
State Representative of Kentucky House District 41, Rep. Attica Scott discusses the importance of the 2020 Census, how it determines redistricting and representation, why you shouldn’t be concerned with completing the survey, and more. For more information on 2020 Census jobs, click here. Learn how you can spread the word here. To view important dates […] Read More »
Supporting a Competitive City: The 2020 Census
A competitive Kentucky and a competitive Louisville both rely on an accurate Census count. Louisville, KY receives a portion of this money through Census data. The US government provides over $675 billion in grants, funds, and support to states, cities, and communities. The distribution of these funds is based on Census data.Locally, Census-related funds touch […] Read More »
Natural Breaks Algorithm
For each indicator, Greater Louisville Project assigns cities into one of three groups (high-performing, middle-of-the-pack, and low-performing) based on how they compare to other cities. The assignment is based on how cities naturally cluster on that indicator. Sometimes, the differences between cities are very small, and the difference between a city ranked 5th and 6th could simply be a matter of the sampling error that arises from using survey data. Thus, rather than always make a division that declares the top 5 to be the top tier, we use a natural breaks algorithm to look for a cluster of cities that is outperforming the rest, a cluster that is about average, and a cluster that is lagging. This clustering gives us a better indication of where Louisville is thriving and where Louisville has room to learn from cities that are doing better.
Z-Scores
Z-scores (or standardization) is a way to combine data with different units of measurement into a single index. The z-score is a measure of how far away a city (or census tract, etc.) is from the average city. In order to be comparable across different units of measurement, the z-score is the distance from the mean measured in standard deviations (e.g. if Louisville has a z-score of 1 it means Louisville is 1 standard deviation above the mean of its peer cities).
Data from the Robert Wood Johnson Foundation's County Health Rankings use z-scores and all z-scores are relative to the mean of Louisville's peer cities. (On the County Health Rankings site z-scores are relative to all the counties in each state - thus z-scores reported by GLP will be different, because we are using a different reference group). The Greater Louisville Project also uses z-scores in our multidimensional poverty index, which compares each census tract to the mean of all census tracts in Louisville.