5
1 1)
1 2)
1
1 2556 1,759
176
1,583
(Stratified Random
Sampling) 123
310 433
1
1
1
1
1
1
1 1
1 9
1
1
417
433 96.30
(Quantitative Data)
(f) (%)
(X ) (S.D.)
1.
1
1.1
1
1
1
1
1
1
1
1.2
1

บทที่ 5