| Day | Challenge | Level |
|---|---|---|
| 0 | Mean, Median, and Mode | easy |
| 0 | Weighted Mean | easy |
| 1 | Quartiles | easy |
| 1 | Interquartile Range | easy |
| 1 | Standard Deviation | easy |
| 2 | Basic Probability | easy |
| 2 | More Dice | easy |
| 3 | Compound Event Probability | easy |
| 3 | Cards of the Same Suit | easy |
| 3 | Drawing Marbles | easy |
| 4 | Binomial Distribution I | easy |
| 4 | Binomial Distribution II | easy |
| 4 | Geometric Distribution I | easy |
| 4 | Geometric Distribution II | easy |
| 5 | Poisson Distribution I | easy |
| 5 | Poisson Distribution II | easy |
| 5 | Normal Distribution I | easy |
| 5 | Normal Distribution II | easy |
| 6 | The Central Limit Theorem I | easy |
| 6 | The Central Limit Theorem II | easy |
| 6 | The Central Limit Theorem III | easy |
| 7 | Pearson Correlation Coefficient I | easy |
| 7 | Spearman's Rank Correlation Coefficient | easy |
| 8 | Least Square Regression Line | easy |
| 8 | Pearson Correlation Coefficient II | medium |
| 9 | Multiple Linear Regression | medium |