// METHODOLOGY
In order to identify whether Community District 12 (which has the highest number of noise complaints) is a noise complaint hotspot, a hotspot analysis using G-Statistic GI* was done in order to determine hotspots of community districts throughout New York City. A distance band of 5,280 feet or 1 mile was done as it is roughly the length of many of the community districts. Community District 12 was found to be a hotspot with a 99% significance, with a z-score of 3.988312. No cold spots of community districts were identified.
Community Districts 12 and 3 were identified as having the highest number of noise complaints. The 311 noise complaint data was joined with the block groups for each of these community districts for this analysis. In order to identify hotspots by block group within Community Districts 12 and 3, a hotspot analysis using G-Statistic GI* was done. A distance band of 500 feet was used, which is roughly the length of average block group within both districts. Community District 12 was found to have 3 hotspot block groups with a 99% significance, with z-scores of 4.0225, 3.8759, and 2.997; and 2 hotspot block groups with a 95% significance, with z-scores of 2.5568 and 2.2637. Community District 3 was found to have 2 hotspot block groups with a 99% significance, with z-scores of 3.4144 and 3.0453; 3 hotspot block groups with a 95% significance, with z-scores of 2.4606, 2.1891, and 2.1891; and 4 hotspot block groups with a 90% significance, with z-scores of 1.9191, 1.9191, 1.7016, and 1.7837.
Sources: NYC 311, NYC Department of City Planning: PLUTO
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