From: Examining the role of spatial skills and mathematics motivation on middle school mathematics achievement
Variable
M
SD
skewness
kurtosis
min
max
n
Spatial skills
7.72
3.40
0.66
2.84
2
19
1056
MMQ
102.76
17.04
− 0.27
2.98
42
143
M-STEP
1590.81
21.91
− 0.22
3.14
1518
1650
Science GPA
2.97
1.02
− 0.96
3.19
0
4.33
1048