Untitled - Malaysian Institute of Planners

PLANNING MALAYSIAJournal of the Malaysia Institute of Planners (2012)ComponentTable 6: Respondents’ opinion on the composition of C&D wastes.Level of contributionLeast Less Moderate More Mostcontrib contributor contributor contributor contributorutor (1) (2)(3)(4)(5)MeanWood 0 (0) 0 (0) 16 (32) 8 (25) 8 (25) 3.75Concrete 0 (0) 5 (16) 6 (19) 14 (44) 7 (22) 3.72Bricks 0 (0) 5 (16) 11 (34) 8 (25) 8 (25) 3.59Plastics 0 (0) 3 (9) 16 (50) 9 (28) 4 (13) 3.44Others 0 (0) 1 (3) 6 (19) 1 (3) 2 (6) 3.40Reinforced 0 (0) 5 (16) 17 (53) 8 (25) 3 (9) 3.38ConcretePaper/ Cardboards 3 (9) 4 (13) 10 (31) 10 (31) 5 (16) 3.31Rubble 1 (3) 8 (25) 12 (38) 5 (16) 6 (19) 3.22Metals 2 (6) 3 (9) 17 (53) 8 (25) 2 (6) 3.16Reinforcement 2 (6) 4 (13) 11 (34) 13 (41) 1 (3) 3.13Drywall 1 (3) 2 (6) 22 (69) 6 (19) 1 (3) 3.13Roofing 1 (3) 8 (25) 13 (41) 8 (25) 2 (6) 3.06Rubber 2 (6) 7 (22) 18 (56) 2 (6) 3 (9) 2.91Glass 3 (9) 8 (25) 12 (38) 8 (25) 1 (3) 2.88*It is noted here that the total sample size is 32It is clear that wood, concrete, bricks, and plastics constitute the bulk ofC&D waste materials. From the whole table, the single highest percentage (69)of respondents said that drywalls constitute moderately to C&D wastes.Generally speaking, most of the respondents held the view that the componentseither constitute moderately or more than moderately to the C&D wastes (this isevident from the columns “Moderate contributor” and “More contributor”). Wealso observe that rubber and glass comprise the least amount to C&D wastes.From the mean values, we can also conclude that moderate contributors arereinforced concrete, drywall, metals, rubble, and paper/cardboards. In additionto the above findings, with one way ANOVA, one & two way MANOVA hasalso been performed. In this regard, the independent variables are professionand working experience and dependent variables are various composition of C& D waste. One-way ANOVA test shows that respondents’ profession does nothave significant impact on their opinion except the component ‘Roofing’. Onthis component, quantity surveyors (M=3.778) and contractors (M=2.417) differsignificantly (F=8.559, p=0.001). With regards to working experience, 1-wayANOVA reveals that ‘less than 5 years’ (M=3.000) differ significantly from the‘5-14 years’ (M= 3.636) (F=3.815, p=0.034). However, they do not differ on theremaining components. One-way as well as two-way MANOVA tests confirmthe findings as shown in Table 7.113© 2012 by MIP