From: The effectiveness of using in-game cards as reward
Descriptive statistic
t test
N
Mean
SD
t
df
p
Pre-test
Boy
54
56.78
32.465
−0.357
127
0.721
Girl
75
58.77
30.399
Post-test
56.52
27.705
0.172
0.864
55.73
23.868