กลุ่มตัวอย่างที่ใช้ในการวิจัย
The sample included 275 administrators under the Jurisdiction of the Prachin Buri Office of Educational Service Area in the 2549
B.E. academic year, selected by simple random sampling.
The sample included 5 scholars, 17 experts and 103 administrators. The research instrument was a questionnaires.