1. **State the problem:** We have a stem-and-leaf plot showing the number of peppermint candies per jar, and we need to complete the frequency table by finding the missing number of jars in the 11-20 interval. 2. **Understand the stem-and-leaf plot:** The stem represents the tens digit, and the leaves represent the units digit of the number of candies. 3. **Analyze the stem 1 row:** The stem 1 has leaves 2, 3, 5, 6 which correspond to the numbers 12, 13, 15, and 16. 4. **Count the jars in the 11-20 interval:** Since 11-20 corresponds to stem 1, the number of jars is the count of leaves in stem 1. 5. **Calculate:** There are 4 leaves (2, 3, 5, 6), so there are 4 jars in the 11-20 interval. 6. **Complete the frequency table:** | Number of peppermint candies | Number of jars | |------------------------------|----------------| | 11-20 | 4 | | 21-30 | 1 | | 31-40 | 3 | | 41-50 | 1 | | 51-60 | 1 | | 61-70 | 2 | **Final answer:** The missing number of jars in the 11-20 interval is **4**.