Nursahid I, Abadi AM, Sianipar WA. Assessing the problem-solving test items and self-efficacy questionnaire in statistics education. BetaJTM [Internet]. 2026 May 30 [cited 2026 May 30];19(1):39-57. Available from: https://www.jurnalbeta.ac.id/index.php/betaJTM/article/view/779