. The statistic exam scores from a sample of students are shown below. Make a stem and leaf plot for the data. 98, 73, 64, 69, 86, 89, 77, 86, 91, 73 10. Then find the mean, median and mode for the data in #9.

Let's break this into two parts: creating a stem-and-leaf plot and calculating the mean, median, and mode.

### 1. **Stem-and-Leaf Plot**
The stem will represent the tens digit, and the leaf will represent the units digit. For the given dataLet's break this into two parts: creating a stem-and-leaf plot and calculating the mean, median, and mode.

### 1. **Stem-and-Leaf Plot**
The stem will represent the tens digit, and the leaf will represent the units digit. For the given 

**Data:** 98, 73, 64, 69, 86, 89, 77, 86, 91, 73

#### Stem and Leaf Plot:
```
6 | 4 9
7 | 3 3 7
8 | 6 6 9
9 | 1 8
```

- **6 | 4 9** represents the values 64 and 69.
- **7 | 3 3 7** represents the values 73, 73, and 77.
- **8 | 6 6 9** represents the values 86, 86, and 89.
- **9 | 1 8** represents the values 91 and 98.

### 2. **Mean, Median, and Mode**

#### Mean:
To find the mean, sum the numbers and divide by the number of data points.

\[
\text{Sum} = 98 + 73 + 64 + 69 + 86 + 89 + 77 + 86 + 91 + 73 = 806
\]
\[
\text{Mean} = \frac{806}{10} = 80.6
\]

#### Median:
To find the median, arrange the data in ascending order and find the middle value(s).

**Ordered Data:** 64, 69, 73, 73, 77, 86, 86, 89, 91, 98

There are 10 data points, so the median will be the average of the 5th and 6th values.

\[
\text{Median} = \frac{77 + 86}{2} = 81.5
\]

#### Mode:
The mode is the value that occurs most frequently.

In this data, **73** and **86** both occur twice, so the data is bimodal. The modes are **73** and **86**.

---

### Summary:
- **Mean:** 80.6
-

The statistic exam scores from a sample of students are shown below. Make a stem and leaf plot for the data. 98, 73, 64, 69, 86, 89, 77, 86, 91, 73. Then find the mean, median and mode for the data in #9.

Learn how to create a stem-and-leaf plot for the given student exam scores: 98, 73, 64, 69, 86, 89, 77, 86, 91, 73. Calculate the mean, median, and mode of the data set. This problem covers important statistical concepts and is suitable for students in Grades 7-9.

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