Table 5.

Student-Newman-Keuls post hoc test results.

Groups	Rank differences	Calculated Z	Critical  Z	p
C− and C+	6.1	2.1567	2.394	0.0310
C− and E6	7.7	2.7224	2.394	0.0065
C+ and E6	1.6	0.5657	2.394	0.5716