To list all the original data values from the stem-and-leaf plot, we interpret each stem and leaf combination based on the given key. According to the key, "21|0" represents the number 21.0, meaning the stem is the whole number part, and the leaf represents the first decimal place.

Here is how we interpret the plot:

• 21 | 357: This represents the numbers 21.3, 21.5, and 21.7.
• 22 | 01: This represents the numbers 22.0 and 22.1.
• 23 | 26: This represents the numbers 23.2 and 23.6.

The original data values are:

• 21.3
• 21.5
• 21.7
• 22.0
• 22.1
• 23.2
• 23.6

Would you like further details or have any questions?

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Here are five related questions to expand your understanding:

1. How do you create a stem-and-leaf plot from a set of data?
2. What are the advantages of using a stem-and-leaf plot?
3. How would you handle a data set with negative numbers in a stem-and-leaf plot?
4. Can a stem-and-leaf plot be used for large data sets effectively?
5. How would you interpret a stem-and-leaf plot with multiple digits in the leaf section?

Tip: Stem-and-leaf plots are especially useful for visualizing the distribution of small to moderately sized data sets while retaining the original data values.