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Data Analysis of City of Roseville Recyclable Materials <br />Comparison of the Current Dual Stream Bi- Weekly <br />Method to the Dual Stream Bi- Weekly Method with <br />Additional Education <br />The residents in the Wednesday pilot area received additional recycling educational <br />materials while their collection method (dual stream) and frequency (bi- weekly) <br />remained unchanged. The results are reflected below in Table 14. <br />Table 14 <br />Comparison of Dual Stream Routes During Pilot <br />Bi- Weekly with Additional Education vs. Bi- Weekly Control <br />' I hree samples were sorted from the Wednesday routes. <br />%Three samples were sorted from the Friday routes. <br />'The totals may not equal the sum of the material categories due to rounding. <br />As shown in Table 14, the upper and lower confidence intervals of the bi- weekly, dual <br />stream with additional education collection routes were not significantly different than <br />the bi- weekly dual stream (control) routes. Thus, the composition of the materials <br />collected did not significantly change. <br />As for the quantities of materials collected, Table 15 below reflects the weights of the <br />quantities collected for each route. <br />B1605 B -13 <br />Wednesday <br />(Addt'I Educ) Route' <br />90% Confidence <br />Friday <br />(Control) Route' <br />90% Confidence <br />Statistically <br />Interval <br />Interval <br />Significant <br />Difference <br />Material <br />Mean <br />Lower <br />Upper <br />Mean <br />Lower <br />Upper <br />Category <br />Paper <br />56.4% <br />53.4% <br />59.5% <br />59.5% <br />53.9% <br />65.1% <br />Metals <br />8.9% <br />7.8% <br />10.0% <br />6.7% <br />6.0% <br />7.5% <br />Glass <br />18.3% <br />14.7% <br />21.8% <br />22.2% <br />14.5% <br />29.8% <br />Plastic <br />12.3% <br />9.5% <br />15.1% <br />8.6% <br />6.3% <br />10.9% <br />Contaminants <br />4.1% <br />3.8% <br />4.4% <br />3.0% <br />2.5% <br />3.5% <br />Total3 <br />1 100% <br />n/a <br />n/a <br />100% <br />n/a <br />n/a <br />' I hree samples were sorted from the Wednesday routes. <br />%Three samples were sorted from the Friday routes. <br />'The totals may not equal the sum of the material categories due to rounding. <br />As shown in Table 14, the upper and lower confidence intervals of the bi- weekly, dual <br />stream with additional education collection routes were not significantly different than <br />the bi- weekly dual stream (control) routes. Thus, the composition of the materials <br />collected did not significantly change. <br />As for the quantities of materials collected, Table 15 below reflects the weights of the <br />quantities collected for each route. <br />B1605 B -13 <br />