The purpose of this study: (1) To test and analyze the effect of price perceptions on customer satisfaction of BRT Trans Jateng. (2) Testing and analyzing service quality on BRT Trans Jateng customer satisfaction. The subjects of this study were Trans Jateng BRT (Bus Rapid Transit) consumers in 2023. This study used a quantitative approach with data collection methods using a questionnaire. The population in this study is unknown. This study used a random sampling method with a sample of 100 respondents. The data analysis method used is multiple linear regression analysis. The results showed that (1) Price perception has a positive effect on customer satisfaction for BRT Trans Central Java. (2) Service quality has a positive effect on BRT Trans Jateng customer satisfaction.

This study aims to describe and analyze the effect of student discipline on learning achievement in fourth grade students of SD N Batursari 01 Mranggen in the 2021/2022 Academic Year. This type of research is descriptive statistics. The population in this study were all fourth grade elementary school students, totaling 200 students. The research sample was selected by cluster sampling technique. The research data was collected using a questionnaire method given to 117 students from SD N Batursari 03 Mranggen, SD N Batursari 02 Mranggen, and SD N 01 Mranggen. The data obtained were tested using a simple regression test with the help of the SPSS for Windows version 16.0 . program
The results of this study indicate that student discipline is classified as very high with an average of 79.38. The test results show that the student discipline variable has a significant effect on the student achievement variable, with the results of the calculation tcount = 2,513 meaning tcount > ttable (ttable = 1.9808). Thus, one of the reasons for the high and low learning achievement of students is the discipline of students by 52%, but it is also caused by other factors of 48%, both internal and external factors.

This study aims to determine the effect of service quality, convenience, efficiency and trust on customer satisfaction of Bank BCA Kranggan Semarang Branch. The population in this study were customers of Bank BCA Kranggan Semarang Branch. Sampling in this study with non-probability sampling technique with purposive sampling type. Based on Slovin's calculation, there were 96 respondents. Data analysis using multiple linear regression test. The results showed that partially service quality, convenience, efficiency and trust in customer satisfaction. The value of the coefficient of determination on the effect of service quality, convenience, efficiency and trust on customer satisfaction of Bank BCA Kranggan Semarang Branch is 82%.