Samples are in Bangkok, Nakhon Ratchasima province, municipality, County, the number of 400 people, using a convenient sampling (Sampling Convenience) used to calculate sample size formula of the W.G.Cocharn tool that is used in a query that is used to analyze data, including average percent standard deviation. T test (t-test)-an analysis of variance (One-way Anova), the only way to use the 0.05 significance level.
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