16. 勝手にコマンドを打ってくれる
Rcmdr> summary(test_data)
X English Math Japan
ese
Min. : 1.0 Min. :23.00 Min. :55.00 Min. : 3
1st Qu.: 250.8 1st Qu.:36.00 1 st Qu.:67.00 1st Qu.:17
Median : 500.5 Median :40.00 Median :70.00 Median :20
Mean : 500.5 Mean :39.81 Mean :70.13 Mean :20
3rd Qu.: 750.2 3rd Qu.:43.00 3rd Qu.:74.00 3rd Qu.:23
Max. :1000.0 Max. :54.00 Max. :90.00 Max. :36