2020 IEEE 7th International Conference on Industrial Engineering and Applications (ICIEA)
This study presents two statistical methods for testing the signal-to-noise ratio (SNR) of a log-... more This study presents two statistical methods for testing the signal-to-noise ratio (SNR) of a log-normal distribution. The proposed statistical tests were based on the generalized confidence interval (GCI) approach and the large sample (LS) approach. To evaluate the performance of the proposed statistical tests, a simulation study was conducted under several values of SNR in a log-normal distribution. The performances of the statistical tests were compared based on the empirical size and power of the test. The simulation results showed that the statistical test based on the GCI approach performed better than the statistical test based on the LS approach in terms of the attained nominal significance level, and the empirical power of the test and is thus recommended for researchers. The performances of the proposed statistical tests also were examined through a numerical example.
The purpose of this study was to determine the factors affecting the group classification of rece... more The purpose of this study was to determine the factors affecting the group classification of recent graduates as employed or unemployed. The population of the research was 629 recent graduates who had finished a bachelor degree at the Faculty of Science and Technology, Thammasat University in 2015. Systematic Sampling was employed to sampling data from the population, sample size was 516 cases. The instrument used in this study was a questionnaire. Data were analyzed by frequency, percentage, mean, standard deviation, and discriminant analysis. The study found that the percentage of recent graduates who were employed and unemployed were 55.0% and 45.0% respectively. Six independent variables: gender, grade point average (gpa), duration of job seeking (seeking), the desire to further study at master degree level (desire), duration of additional training (training) and achievement motivation (achieve), these variables were able to correctly predict the members of the both groups of re...
2020 IEEE 7th International Conference on Industrial Engineering and Applications (ICIEA)
This study presents two statistical methods for testing the signal-to-noise ratio (SNR) of a log-... more This study presents two statistical methods for testing the signal-to-noise ratio (SNR) of a log-normal distribution. The proposed statistical tests were based on the generalized confidence interval (GCI) approach and the large sample (LS) approach. To evaluate the performance of the proposed statistical tests, a simulation study was conducted under several values of SNR in a log-normal distribution. The performances of the statistical tests were compared based on the empirical size and power of the test. The simulation results showed that the statistical test based on the GCI approach performed better than the statistical test based on the LS approach in terms of the attained nominal significance level, and the empirical power of the test and is thus recommended for researchers. The performances of the proposed statistical tests also were examined through a numerical example.
The purpose of this study was to determine the factors affecting the group classification of rece... more The purpose of this study was to determine the factors affecting the group classification of recent graduates as employed or unemployed. The population of the research was 629 recent graduates who had finished a bachelor degree at the Faculty of Science and Technology, Thammasat University in 2015. Systematic Sampling was employed to sampling data from the population, sample size was 516 cases. The instrument used in this study was a questionnaire. Data were analyzed by frequency, percentage, mean, standard deviation, and discriminant analysis. The study found that the percentage of recent graduates who were employed and unemployed were 55.0% and 45.0% respectively. Six independent variables: gender, grade point average (gpa), duration of job seeking (seeking), the desire to further study at master degree level (desire), duration of additional training (training) and achievement motivation (achieve), these variables were able to correctly predict the members of the both groups of re...
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Papers by Benjamas Tulyanitikul