c)

Paired Samples T-Test Paired Samples T-Test 95% Confidence Interval statistic df p Mean difference SE difference Lower Upper Placebo MPH Student's t 0.193 23.0 0.848 0.375 1.94 -3.64 4.39 MPH MPH+mfl Student's t 3.053 23.0 0.006 4.667 1.53 1.51 7.83 MPH+mfl MPH+ZCM Student's t 0.181 22.0 0.858 0.304 1.68 -3.19 3.79 Note. He H Measure 1 - Measure 2 # 0 Descriptives N Mean Median SD SE Placebo 24 44.7 42.5 12.32 2.51 MPH 24 44.3 42.0 11.77 2.40 MPH 24 44.3 42.0 11.77 2.40 MPH+mfl 24 39.7 39.0 9.14 1.86 MPH+mfl 23 39.3 39 9.16 1.91 MPH+ZCM 23 39.0 36 10.94 2.28Repeated Measures ANOVA Within Subjects Effects Sphericity Correction Sum of Squares df Mean Square F p RM Factor 1 None 483 3 161.0 4.43 0.007 Huynh-Feldt 483 2.98 162.2 4.43 0.007 Residual None 2398 66 36.3 Huynh-Feldt 2398 65.51 36.6 Note. Type 3 Sums of Squares [4] Between Subjects Effects Sum of Squares df Mean Square F P Residual 8045 22 366 Note. Type 3 Sums of Squares Assumptions Tests of Sphericity Mauchly's W p Greenhouse-Geisser & Huynh-Feldt e RM Factor 1 0.810 0.497 0.866 0.993