Results

Independent Samples T-Test

Independent Samples T-Test
  Test Statistic df p VS-MPR* Mean Difference SE Difference Cohen's d
ArithInclude Student 2.646 54.00 0.011 7.601 11.74 4.439 0.730
  Welch 3.013 53.92 0.004 16.897 11.74 3.897 0.777
* Vovk-Sellke Maximum p -Ratio: Based on a two-sided p -value, the maximum possible odds in favor of H₁ over H₀ equals 1/(-e p log( p )) for p ≤ .37 (Sellke, Bayarri, & Berger, 2001).

Descriptives

Group Descriptives
  Group N Mean SD SE
ArithInclude c 35 64.31 18.57 3.138
  i 21 52.57 10.59 2.310

Bayesian Independent Samples T-Test

Bayesian Independent Samples T-Test
  BF₊₀ error %
ArithInclude 9.020 ~ 6.163e -4
Note.  For all tests, the alternative hypothesis specifies that group c is greater than group i .

Inferential Plot

ArithInclude

Bayes Factor Robustness Check