Sample Population

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    11-Apr-2015

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ประชากรและกลุ่มตัวอย่าง

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Population and Sample

(Elements) (Units of analysis)

(1)

(2)

(1)

.. 2501 2530 15 45

(2)

?

()

?

(Homogeneity) (Heterogeneity)

(Non probability sample)

(Probability Sample)

(Non probability sample)

(Accidental Sample) (Quota Sample) (Purposive Sample)

(Accidental Sample)

(Quota Sample)

4

(Purposive Sample)

(Probability Sample)

(Simple Random Sampling) (Systematic Sampling) (Stratified Sampling) (Cluster Sampling) (Multi-stage Sampling)

(Simple Random Sampling) n N () ()

1 7 13 19 25 2 8 14 20 26 3 9 15 21 27 4 10 16 22 28 5 11 17 23 29 6 12 18 24 30

(Stratified Sampling) ( ) 20% 25% 15% 10% 25% 10% 30% 20% 45%

60% 40% 100%

(Systematic Sampling) 1 k k n k = 10 9

(Cluster Sampling) N n

(Multi-stage Sampling) .. .1 .2 .3 3 3 3 2 2 100 100 100 100 100 100 100 100 100 100 100 100 100

300 300 300 200 200