Given the key "21|0 = 2.10," this indicates that the stem represents the first two digits, and the leaf represents the last digit, where the leaf is in the tenths place.

Let's interpret the stem-and-leaf plot:

• 21 | 357:

  • 21|3 = 2.13
  • 21|5 = 2.15
  • 21|7 = 2.17

• 22 | 01:

  • 22|0 = 2.20
  • 22|1 = 2.21

• 23 | 26:

  • 23|2 = 2.32
  • 23|6 = 2.36

The original data values are:

• 2.13
• 2.15
• 2.17
• 2.20
• 2.21
• 2.32
• 2.36

Would you like further details or have any questions?

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Here are five related questions to expand your understanding:

1. How would you construct a key for a stem-and-leaf plot if the data values had more than one decimal place?
2. What steps would you take to create a stem-and-leaf plot for a large set of data?
3. How can you modify a stem-and-leaf plot to handle data with values less than 1?
4. What are the limitations of stem-and-leaf plots compared to histograms?
5. How does the choice of stem and leaf affect the interpretation of the data?

Tip: Always check the key in a stem-and-leaf plot to correctly interpret the data, as the key defines how the stems and leaves translate into actual data values.