AMC8 2016

AMC8 2016 · Q6

AMC8 2016 · Q6. It mainly tests Averages (mean), Casework.

The following bar graph represents the length (in letters) of the names of 19 people. What is the median length of these names? *(Bar graph with horizontal axis labeled name length: 3,4,5,6,7 and vertical axis frequency; frequencies: 7 at 3, 3 at 4, 1 at 5, 4 at 6, 4 at 7)*

下图柱状图表示19个人的名字长度（以字母数计）。这些名字的长度中位数是多少？*(柱状图横轴标签为名字长度：3,4,5,6,7，纵轴为频数；频数：3处为7，4处为3，5处为1，6处为4，7处为4)*

(A) 3 3

(B) 4 4

(D) 6 6

(E) 7 7

Answer

Correct choice: (B)

正确答案：（B）

Solution

Answer (B): The 19 name lengths are 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 5, 6, 6, 6, 6, 7, 7, 7, 7. The tenth value, 4, is the median.

答案 (B)：19 个名字长度分别为 3、3、3、3、3、3、3、4、4、4、5、6、6、6、6、7、7、7、7。第十个数 4 是中位数。

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