โดยการวิเคราะห์ทางสถิติ ด้วยโปรแกรม SPSS (Statistical Package for the Social Science for Windows)และเปรียบเที่ยบค่าเฉลี่ยด้วยวิธี Least Significant Difference (LSD)
By statistical analysis with SPSS (Statistical Package for the Social Science for Windows) and compared with the average thiap Least Significant Difference (LSD) method.
The statistical analysis using SPSS (Statistical Package for the Social Science for Windows) and comparison with the average by Least Significant Difference (LSD).
By statistical analysis with the program SPSS (Statistical Package for the Social Science for Windows) and comepared average way. Least Significant Difference (LSD).