AMC 8 2016 Problem 6
AMC8 2016 年第 6 题
统计与数据图表★★☆☆☆
The following bar graph represents the length (in letters) of the names of 19 people. What is the median length of these names?
下面的柱状图代表了 19 个人的名字的长度（字母个数）。那么这些名字长度的中位数是多少？
Frequency | 频率
Name length | 名字长度
- A.3
- B.4
- C.5
- D.6
- E.7
正确答案 · Correct Answer
B
解析 · Solution
Solution 1
We first notice that the median name will be the name. The name is 4.
To find the median length of a name from a bar graph, we must add up the number of names. Doing so gives us 7 + 3 + 1 + 4 + 4 = 19. Thus the index of the median length would be the 10th name. Since there are 7 names with length 3, and 3 names with length 4, the 10 th name would have 4 letters. Thus our answer is 4.
继续练习