Question

the receptionist at a doctors office kept track of each patients wait time.
doctors office wait times (minutes)
stem | leaf
1 | 0
2 | 4 8
3 | 8
4 | 5 7 7 7 7
5 | 4 5
6 | 8
7 | 4 4 4 9
8 | 1 5 6 7
how many people waited for exactly 47 minutes?
□ people

Explanation:

Step1: 确定茎和叶的含义

在茎叶图中，茎代表十位数字，叶代表个位数字。对于等待时间47分钟，茎是4，叶是7。

Step2: 查找茎为4时叶为7的数量

观察茎叶图中茎为4的行（即“4 | 5 7 7 7 7”），数出叶为7的个数。这里叶为7的有4个。

Answer:

4