| data51 | Data set number 1 for descriptive statistics |
| data52 | Data set number 2 for descriptive statistics |
| data53 | Data set number 3 for descriptive statistics |
| data54 | Data set number 4 for descriptive statistics |
| data81 | Data set for statistical hypothesis testing |
| data82 | Data set for the paired t-test |
| data91 | Data set for simple linear regression model |
| data92 | Data set for multiple linear regression model |