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Study This goal is to ascertain how return on investment affects the share price of PT Astra International. Time frame for the study: this covers the years 2013–2018. population studied This is a mining company that is listed on IDX. Purposive sampling is used in the election sample. In the years 2008 to 2010, there were up to 31 firms miningyang listed on the IDX. utilized data analysis Simple regression analytical techniques are used to test the hypothesis.According to a results study, the results mark significance of 0.935 acquired by results processing statistics is larger than the criteria significance (0.05). The regression model is therefore not significant. Therefore, the linearity criterion is satisfied by linear regression. The R2 result is 0.002 which indicates that the variability variable dependent may be described by the variability variable independent by 0.2% while the remaining 99.8% is explained by other factors not included in the regression model.

This study aims to determine the effect of NPF on net income in Islamic commercial banks. This study uses a quantitative approach to the type of descriptive research. The population in this study was 14 Islamic commercial banks listed on the Indonesian stock exchange from 2015-2019, while the sampling technique used was purposive sampling. The data analysis method used is simple regression analysis to test the effect of NPF on net income. Before the simple regression test, a prerequisite analysis test was conducted, which consisted of a normality test and a homogeneity test. Based on the data analysis results, it can be seen that tcount is -3.084 and the significant value is 0.009 <0.05 so that there is an influence between NPF and net income. From the research results, it can be concluded that the NPF variable influences the net income of 37.8% of state-owned Islamic banks during the 2015-2019 period.

This study aims to assess and identify the influence of role conflict and role ambiguity and the independence commitment of internal auditors to work at the Regional Development Bank of North Sumatra, Nias Islands Region. Determination of respondents is done by purposive sampling, which is a sampling technique based on certain criteria. The number of questionnaires distributed was 35 questionnaires. This study uses simple linear regression. The results of the analysis in this study indicate that the role conflict and the ambiguity of each affect.