This study aims to analyze the influence of service quality and promotion, both partially and simultaneously, on purchase decisions among Shopee application users in the Tamantirto area, Bantul, Yogyakarta. A quantitative approach was employed using purposive sampling techniques, involving 100 respondents. Data were collected through online questionnaires. The data obtained were analyzed using multiple linear regression, partial test (t-test), simultaneous test (F-test), as well as correlation and determination coefficient calculations. The analysis results show that both service quality and promotion have a significant influence on purchase decisions, both individually and collectively. The correlation coefficient (R) reached 0.828, while the Adjusted R Square value was 0.680, indicating that both independent variables contribute strongly to the dependent variable.
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