/

/ POPULATION / SAMPLE1 (population) (sample)

2 . ( ) . 3 / ,

4 (Probability Sampling)

5 (Simple Random sampling) . / 6 (Stratified Random Sampling)

7 (Systematic Random Sample) : 5, 10, 15, 20 ......... 8 (Cluster Sampling) . /

9( ) / ? 10 (Purposive Sampling) . / /

11 (Incidental Sampling) / . .12 (convenient Sampling) 13 (Quota Sampling) . / / 70 % / 30 % 14 .

/

15 (Content Validity)

(Predictive Validity)

(Criterion Related Validity)

(Cocurrent Validity)

(Face validity)

16 (consistency) /

,

. (stability)17 (Parallel Test Method)

(Test Retest Method)

(Split half test method)

18(Objectivity)

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, , , .19

.

20 21

22