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  Indian J Med Microbiol
 

Table 1: The results of Levin test for investigating quality of groups' variance show that the assumption of variance equality is not rejected about none of the variables (P>0.05), the parameter test can be used

Table 1: The results of Levin test for investigating quality of groups' variance show that the assumption of variance equality is not rejected about none of the variables (P>0.05), the parameter test can be used