Table 4. Purchase decision of different educational backgrounds and multiple comparison LSD difference test.

Educational background	Mean value	Standard error	Mean difference
C1 = high school and below	2.408	0.586
C2 = college	2.696	0.6892
C3 = undergraduate	2.925	0.8075
C4 = graduate	3.368	0.7811
C1-C2			-0.2875
C1-C3			-0.5169*
C1-C4			-0.9598*
C2-C3			-0.2294
C2-C4			-0.6724*
C3-C4			-0.4430*

*The mean difference is significant at the 0.05 level

**the mean difference is significant at the 0.01 level.