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Let's break down the problem step by step.

### Problem Details:
The problem involves a data set showing the number of students absent from City Bay High School over 40 days during winter. Based on the data, we need to:

1. Construct a stem-and-leaf plot.
2. Redraw the stem-and-leaf plot so that it is ordered.
3. Identify the highest and lowest number of absences for the period.
4. Calculate the percentage of days where 40 or more students were absent.
5. Determine the percentage of days when attendance was "good" (defined as having fewer than 25 absences).

### Data Set:
The data provided are as follows:
```
21, 26, 13, 17, 25, 35, 27, 21, 43, 29,
34, 24, 16, 38, 13, 17, 25, 29, 34, 34,
24, 20, 23, 23, 38, 35, 22, 21, 19, 34,
20, 15, 18, 23, 28, 30, 29, 33, 26, 35
```

### Step 1: Construct a Stem-and-Leaf Plot
The stem will represent the tens place, and the leaf will represent the units place. We’ll use the tens digits as stems (1, 2, 3, 4), and the units digits as leaves.

### Step 2: Organize and Draw the Stem-and-Leaf Plot
The data needs to be ordered for the stem-and-leaf plot. Here is the ordered list:

```
13, 13, 15, 16, 17, 17, 18, 19, 20, 20, 21, 21, 21, 22, 23, 23, 23, 24, 24, 25,
25, 26, 26, 27, 28, 29, 29, 29, 30, 33, 34, 34, 34, 34, 35, 35, 35, 38, 38, 43
```

Now, constructing the stem-and-leaf plot:

| Stem | Leaf            |
|------|-----------------|
| 1    | 3, 3, 5, 6, 7, 7, 8, 9 |
| 2    | 0, 0, 1, 1, 1, 2, 3, 3, 3, 4, 4, 5, 5, 6, 6, 7, 8, 9, 9, 9 |
| 3    | 0, 3, 4, 4, 4, 4, 5, 5, 5, 8, 8 |
| 4    | 3             |

### Step 3: Identify the Highest and Lowest Number of Absences
- **Highest number of absences**: 43
- **Lowest number of absences**: 13

### Step 4: Percentage of Days with 40 or More Absences
There is only **1** day with 40 or more absences (43).
- **Percentage**: \(\frac{1}{40} \times 100\% = 2.5\%\)

### Step 5: Percentage of Days with "Good" Attendance (Fewer than 25 Absences)
There are **26** days with fewer than 25 absences.
- **Percentage**: \(\frac{26}{40} \times 100\% = 65\%\)

---

Would you like more details or have any questions? Here are five relative questions you could explore:

1. How would the results change if the definition of "good" attendance was adjusted to fewer than 20 absences?
2. How could you use a histogram to represent this data visually?
3. What other types of statistical analysis could be performed on this data set?
4. How would you calculate the mean and median number of absences?
5. What can the mode of this data tell you about student attendance trends?

**Tip:** Remember that the stem-and-leaf plot is a great way to quickly assess the shape of a distribution, especially for smaller data sets.

Explore how to analyze absence data from City Bay High School over 40 days using statistical methods. Construct a stem-and-leaf plot, identify highest and lowest absences, and calculate percentages of days with high and good attendance.

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