Results

Descriptive Statistics

Descriptive statistics for the sample, excluding the girls-only school.

Descriptive Statistics
  OfficialScore
Valid 840
Missing 0
Mean 41.242
Std. Deviation 19.271
Minimum 0.000
Maximum 108.000


ANOVA

Main ANOVA, excluding the girls-only school.

ANOVA - OfficialScore
Cases Sum of Squares df Mean Square F p η²
Form 190.071 1 190.071 0.514 0.474 6.099e -4
Gender 2131.432 1 2131.432 5.761 0.017 0.007
Form Gender 21.700 1 21.700 0.059 0.809 6.964e -5
Residuals 309274.368 836 369.945  
Note.  Type III Sum of Squares


Independent Samples T-Test

A t test comparing official scores between male and female participants, excluding the girls-only school.

Independent Samples T-Test
t df p Cohen's d
OfficialScore -2.391 838 0.017 -0.165
Note.  Student's t-test.

Descriptives

Group Descriptives
  Group N Mean SD SE
OfficialScore F 390 39.538 18.493 0.936
  M 450 42.718 19.824 0.934