Question

step 2 of 3 : how many people weigh in the range from 160 to 200 inclusive?
stem | leaves
12 | 1 2 3
13 | 1 2 6 7
14 | 3 4 5 7 8 9
15 | 1 3 5 6 6
16 | 1 3 4 4 6
17 | 1 4 7 7 7
18 | 2 3 5 8
19 | 3 7
20 | 2 2 6 6 8
key 12|1 = 121 pounds
answer
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Explanation:

Step1: Identify relevant stems

Stems 16,17,18,19,20 correspond to 160-200.

Step2: Count leaves for each stem

• Stem 16: 3 leaves ($1,3,4,4,6$ → 5)
• Stem 17: 4 leaves ($1,4,7,7,7$ → 5)
• Stem 18: 3 leaves ($2,3,5,8$ → 4)
• Stem 19: 2 leaves ($3,7$ → 2)
• Stem 20: 4 leaves ($2,2,6,6,8$ → 5)

Step3: Sum the leaf counts

$\text{Total} = 5 + 5 + 4 + 2 + 5$

Answer:

21