Real-World Examples of Stem and Leaf Plots for Grade 7

📚 Quick Study Guide

• 🌱 A stem-and-leaf plot is a way to organize data to show the frequency of each data point.
• ✂️ The 'stem' represents the leading digit(s), and the 'leaf' represents the final digit.
• 📈 Stem and leaf plots visually display the distribution of data and help identify patterns or outliers.
• 🔢 To create a plot: (1) Order the data. (2) Identify stems. (3) List leaves next to corresponding stems. (4) Include a key.
• 🔑 A key is essential to explain what the stem and leaf represent (e.g., 4 | 2 means 42).

Practice Quiz

1. Which of the following is the main purpose of a stem and leaf plot?
   1. A. To calculate the average of a dataset.
   2. B. To display the frequency and distribution of data.
   3. C. To find the median of a dataset only.
   4. D. To perform complex statistical analysis.
2. In a stem and leaf plot, what does the 'stem' typically represent?
   1. A. The smallest digit in the dataset.
   2. B. The leading digit(s) of the data values.
   3. C. The final digit of the data values.
   4. D. The average of the data values.
3. What does the 'leaf' represent in a stem and leaf plot?
   1. A. The entire data value.
   2. B. The leading digit(s) of the data values.
   3. C. The final digit of the data values.
   4. D. The median of the data values.
4. Consider the following stem and leaf plot: 3 | 2 5 5 7. If the key is 3 | 2 = 32, what data values are represented?
   1. A. 3.2, 3.5, 3.5, 3.7
   2. B. 2, 5, 5, 7
   3. C. 32, 35, 35, 37
   4. D. 3, 25, 57
5. A teacher recorded the following test scores: 72, 75, 80, 82, 82, 85, 90, 93. Which stem and leaf plot correctly represents this data?
   1. A. 7 | 2 5\n8 | 0 2 2 5\n9 | 0 3
   2. B. 2 | 7\n0 | 8 2 2 5\n0 | 9 3
   3. C. 7 | 2 5\n8 | 0 2 5\n9 | 0 3
   4. D. 7 | 2 5\n8 | 0 2 2 5\n9 | 3 0
6. Why is it important to include a key when creating a stem and leaf plot?
   1. A. To make the plot look more organized.
   2. B. To explain what the stems and leaves represent.
   3. C. To calculate the average of the data.
   4. D. It's not important; keys are optional.
7. What is an advantage of using a stem and leaf plot over a simple list of numbers?
   1. A. It's easier to calculate the mean.
   2. B. It visually shows the distribution of data.
   3. C. It takes up less space.
   4. D. It's required by all statistical software.