Characterization of Rice Husk Fiber-Reinforced Polyvinyl Chloride Composites under Accelerated Simulated Soil Conditions

Table 5

Mean and standard deviation for the orthogonal experiment.

Treatment no.
Level 1	^c	^b	^b	^a
Level 2	^b	^ab	^ab	^a
Level 3	^a	^a	^a	^a

Note: different superscripts represent significant differences in the data.