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<br />March 23, 2005 <br />Page 5 <br /> <br />Results of Data Analysis <br /> <br />The Project Team compared the results of the following recyclable materials collection methods: <br /> <br />. Comparison of the Monday dual stream collection before the pilot started to the Monday <br />single stream collection during the pilot program. <br /> <br />. Comparison of the aggregated results of the single stream collection method to the <br />aggregated results of the dual stream collection method. <br /> <br />. Comparison of the current dual stream, bi-weekly method (Friday control route) to the dual <br />stream, weekly method (Tuesday). <br /> <br />. Comparison of the current dual stream, bi-weekly method (Friday control route) to the dual <br />stream, bi-weekly method with additional education (Wednesday). <br /> <br />. Comparison of the current dual stream, bi-weekly method (Friday control route) to the dual <br />stream, bi-weekly method with larger, 22-gallon bins (Thursday). <br /> <br />. Comparison of the aggregated results of the dual stream, bi-weekly collection method <br />(Wednesday through Friday) before the pilot started to the results during the pilot program. <br /> <br />The results of each comparison are shown in several tables, along with the Project Team's <br />interpretation of the data. <br /> <br />The mean, and upper and lower 90% confidence intervals are provided along with a column <br />titled "Statistically Significant Difference'. If there is a check mark in this colunm, it indicates <br />that the ranges of the lower and upper confidence intervals between the two collection methods <br />are statistically different. That is, there was no overlap in the percentages and therefore the <br />results between the two methods reflect a statistically significant difference. <br /> <br />Comparison of the Monday Collection Routes <br /> <br />Two Monday collection routes were chosen by the City to be the pilot areas for the single stream <br />collection method. The main difference between the two areas was the age of the housing stock. <br />The first pilot route included older homes, typically with detached, single car garages and higher <br />density than the second pilot route. The second route included newer homes, typically with <br />attached, two stall garages, and lower density than the first pilot route. <br /> <br />For the comparative analysis shown below, the composition results of the two Monday routes <br />during the pilot were combined into one data set for September and one data set for October. <br /> <br />01-00253-10101-0101 1070001 I 13500 P:\13500 Ramsey Co. 2003\RTA\Roseville\FA\B1544 - Final Data Analysis <br />