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    Subjects/PSM/Tests of Significance — t, chi-square
    Tests of Significance — t, chi-square
    medium
    users PSM

    A clinical trial in Mumbai compares the mean systolic blood pressure (mmHg) between two treatment groups: Group A (n=45, receiving Drug X) and Group B (n=48, receiving Drug Y). Both groups are normally distributed with similar variances. The investigator wishes to test whether the mean SBP differs significantly between the two groups. Which test should be used?

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