2.10. Statistical Analysis
Analysis of variance was conducted for each variable measured to investigate the effect of storage time and packaging type, and the interaction of both. This was a repeated measures design using “between-subject” factor. The effect of storage day was measured “within-subjects”. Tukey’s test for multiple comparisons was preformed using the general linear model of SPSS 14.0 for Windows (SPSS, Chicago, Ill., USA) software package. The level of statistical significance was P < 0.05