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การด าเนินงาน 3 ➢ ระยะเวลำกำรด ำเนินกำรส ำรวจ เดือนสิงหำคม - พฤศจิกำยน 2564 ➢ กำรเก็บรวบรวมข้อมูลเชิงปริมำณ โดยกำรให้ตอบแบบสอบถำม ➢ กำรสุ่มตัวอย่ำงโดยวิธีกำรสุ่มแบบหลำยขั้นตอน (Multi–stage Sampling) ก
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