Question

数 $2,3,0,3,1,4,0,3$ 的平均数、中位数和众数之和是多少？

What is the sum of the mean, median, and mode of the numbers $2,3,0,3,1,4,0,3?$

$\ 6.5$

$\ 7$

$\ 7.5$

$\ 8.5$

$\ 9$

答案：C

知识点：平均数中位数（数据）众数

难度评级：720

解答：

重新排序后的列表是 $0,0,1,2,3,3,3,4$ 。

中位数是中间两个数的平均数，即 $\dfrac{2+3}2 = 2.5$ 。众数是 $3$ ，因为 $3$ 出现次数最多。平均数为 $\dfrac{0+0+1+2+3+3+3+4}{8}$ $= \dfrac{16}{8} = 2 .$

它们的和为 $2.5+3+2 = 7.5$ 。

所以正确答案是 C。

The list reordered is $0,0,1,2,3,3,3,4.$

The median is the mean of the middle two numbers, which would be $\dfrac{2+3}2 = 2.5.$ The mode is $3$ since $3$ appears the most. The mean is $\dfrac{0+0+1+2+3+3+3+4}{8}$ $= \dfrac{16}{8} = 2 .$

Their sum is $2.5+3+2 = 7.5.$

Thus, the answer is C .

2010 AMC 8 第 4 题

答案：C

难度评级：720

解答：

其他年份的第 4 题