library(ggplot2)
Grades <- c(31, 47, 52, 64, 64, 70, 72, 73, 73, 80, 80, 81, 86, 88, 89, 90,
91, 92, 92, 98)
summary(Grades)
## Min. 1st Qu. Median Mean 3rd Qu. Max.
## 31.0 68.5 80.0 75.6 89.2 98.0
c <- qplot(Grades, main = "Midterm 1 Grade Distribution", binwidth = 5)
c + geom_histogram(fill = "darkgray", color = "black", binwidth = 5)
| Problem | Concept | Class Average |
|---|---|---|
| 1 | Binomial distribution | 67.08% |
| 2 | Normal distribution | 90.00% |
| 3 | Expected value | 52.50% |
| 4 | Populations versus samples | 75.00% |
| 5 | Individuals and variables | 85.00% |
| 6 | 68-95-99.7 rule | 71.25% |
| 7 | Stemplots and box-plots | 95.00% |
| 8 | Tree diagrams | 80.63% |
| 9 | Binomial distribution | 67.50% |
| 10 | Cumulative distribution functions | 52.50% |
| 11 | Standard deviation | 70.00% |
| 12 | IQR and median versus mean | 79.38% |
| 13 | Expected value | 61.25% |
| 14 | Sample bias | 80.00% |