Statistical properties of shared-border ratios as a function of number of states
The analysis below is part of a study on finding geographical clusters among states with the highest cancer incidence or mortality rates in the United States.
Specifically, as stated in the main article I searched for clusters among the "15" states with highest cancer rates (for every combination of cancer, gender, and race/ethnicity) because the number had to be large enough to allow finding geographic patterns but small enough as to represent states with the highest cancer rates.
Below I present statistical data on how the shared-border ratio is affected by selecting a different number of states (anywhere from 10 to 20 states).
While I used the same data records in the statistical analysis below as in the main study, the one and only difference was that in the analysis below I excluded records that had numerical rates for less than 20 states (while in the main study I excluded records that had numerical rates for less than 15 states). This resulted in analyzing 201 data records (versus 216 records in the main study), or 93% of the original records.
To view statistical data charts of how the shared-border ratio varies as a function of number of states, and to read more on the topic, please make selections below and then click the "Display Results" button.
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