The estimated number of tourists each night, which proportion is 4:4: 2, researchers used a method of selecting, for example, the khowata (Quota Sampling) by storing queries at the floating market Taling Chan floating market, Khlong mayom 160 160 sets of shortcuts, and measuring 80 series bridge market, respectively.This is to continue to collect information on this 3-star all market. Researchers used a chance sampling methods (convenience sampling).Until you have reached the maximum number of samples required. The number of all 400 series
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