In a sample of 26 participants tested for depression before and after a treatment, a researcher calculates a mean difference (before-after) of MD=1.6 and an estimated standard error for the difference...

In a sample of 26 participants tested for depression before and after a treatment, a researcher calculates a mean difference (before-after) of MD=1.6 and an estimated standard error for the difference scores (SMD) of 1.1. Test the hypothesis that the treatment had no effect. Use a two tailed test with alpha = .05. Critical values df = CV = t (2 decimal places) =